And that's the last action as the referee blows the final whistle!
90' +3
INCHES AWAY! Napoli almost win it at the death as the ball drops at the feet of Insigne on the edge of the area. He looks to bend one into the far corner but sees it drift just wide of the far post.
90' +2
CHANCE! Mertens breaks away through the middle on the counter for the visitors. However, he goes for placement rather than power from the edge of the area and Fabricio gathers his effort.
90'
The clock continues to tick down and we are fast approaching stoppage time at the Besiktas Arena. Still no sign of a winner, though...
87'
Both sides have plenty at stake here. Besiktas will go top with a win and move a step closer to their first-ever progression beyond the group stages, while Napoli could qualify for the Last 16 today by claiming three points...
85'
We are now into the last five minutes at the Besiktas Arena! Can either side find a winning goal here? It is very hard to predict which way it will go, though.
83'
C. Tosun gets yellow.
Tosun has his name taken by the referee.
82'
M. Hamšík has scored a goal for Napoli! Assist by D. Mertens.
Mertens laid the ball into the path of Hamsik.
WHAT AN EQUALISER FROM HAMSIK!!! Napoli are level in some style! The visitors are looking to force a way back into this game and their skipper receives the ball in space from 25 yards out. He aims to bend the ball beyond Fabricio into the far corner and hits the jackpot at the vital moment! What a final eight minutes we have now!...
81'
P. Zieliński enters the game and replaces Allan.
Napoli make their third and final change with Jorginho making way for Amadou Diawara.
A second change from the visitors sees Allan replaced by Piotr Zieliński.
79'
A. Diawara enters the game and replaces Jorginho.
Minute
Description
78'
Penalty goal scored by Ricardo Quaresma for Besiktas!
QUARESMA SCORES!!! Napoli remain incensed by the decision as the Euro 2016 winner steps up to the spot. There is plenty of pressure on but, despite Reina getting a hand to it, his firm penalty nestles in the bottom corner and Besiktas have the lead!
77'
PENALTY TO BESIKTAS!!! Aboubakar pulls away from his marker out wide, before his cross clearly hits the arm of Maksimovic. This time, Mr Clattenburg has no hesitation in awarding the spot-kick...
74'
Besiktas have a vague appeal for a penalty when Aboubakar goes down in the box. The referee remains unmoved, though, and points for a corner instead.
72'
Napoli continue to ask questions as they force a corner. However, their momentum is halted when Mertens is penalised for an illegal aerial challenge on Fabricio.
70'
As we approach the final 20 minutes, it is fair to say that a goal would really spark the finale of this match into life. Not many people would have predicted this match to finish goalless, but that is the way it is heading at the moment...
68'
JUST OVER! Mertens is straight into the action with a neat dummy in the area from Ghoulam's low cross. Insigne strikes first time, but cannot keep the ball under the crossbar.
66'
O. Özyakup enters the game and replaces G. İnler.
The hosts also make an alteration as İnler is given a rest against his old club and replaced by Oğuzhan Özyakup.
63'
D. Mertens enters the game and replaces M. Gabbiadini.
Sarri decides it is time for Napoli to make their first change. Gabbiadini makes way to be replaced by Dries Mertens.
61'
The Cameroonian has scored three times and registered an assist in his last two competitive starts for Besiktas, but neither he or the hosts have got a shot on goal so far in this second half.
59'
Aboubakar looks to chase a long ball towards the Napoli penalty area. However, Maksimovic and Koulibaly combine well to tidy the danger and clear.
57'
Jorginho gets yellow.
Jorginho is the first Napoli player to have his name taken by the referee today.
54'
The Black Eagles are flying high this season and are unbeaten in their opening 12 matches in all competitions. However, they cannot afford to give Napoli too much space like that again.
51'
GREAT CHANCE! A neat move from the visitors sees Callejon released in behind the defence. He looks to lift the ball over the advancing Fabricio, but drags his effort wide of the target.
49'
Napoli are asking the questions early in the second half with a couple of dangerous attacks, but they are unable to break down the hosts.
47'
G. İnler gets yellow.
Against his old club, İnler receives the first yellow card of the game for bringing down Callejon, who was threatening to break on the counter attack.
46'
KICK-OFF! The referee blows his whistle and Besiktas get the ball rolling once more.
45' +2
Mr Clattenburg blows his whistle and brings the first half to a close.
45'
ALMOST IN BEHIND! That passing spell gradually advances up the field before Hamsik looks to pick out Callejon with a scooped ball over the top of the defence. However, Fabricio is quickly out of goal to smother.
44'
We're just coming into the final 60 seconds of the first half and Napoli are keeping possession beautifully with some neat one-touch football across their backline.
42'
END-TO-END STUFF! Within just over a minute of Aboubakar's effort, Besiktas find themselves on the back foot. Callejon's deep cross from the right flank finds Insigne unmarked in the box, but the Italian cannot connect cleanly with the volley and drags it wide of the target.
40'
GOOD STRIKE! A long ball forward breaks kindly for Aboubakar to run into the space. The striker advances towards the edge of the area before letting fly with a powerful effort that is well held by Reina.
37'
The hosts will be pleased to be holding firm so far. They may be unbeaten in eight matches at their new home - winning six - but have only kept two clean sheets in that span.
34'
Gabbiadini almost picks out Insigne with a precise through ball that splits the Besiktas defence. However, Reina is alert to the danger and quick out of goal to clear. It would not have mattered, though, as the offside flag had been raised.
32'
STAT ATTACK! Hutchinson has completed the most passes in the Turkish Super Lig so far this season. The Canadian has a very impressive 95% completion rate.
30'
OFF THE POST! The woodwork denies Besiktas the lead! Napoli fail to deal with a ball into the box from the left, as Koulibaly and Maksimovic get in each other's way. It drops kindly for Hutchinson to strike, but the captain's left-footed effort crashes against the upright with Reina beaten.
28'
Things have gone a little bit flat over the past few minutes at the Besiktas Arena. Both sides have lost a bit of flow and possession is changing hands quite frequently.
26'
The arrival of Tosun to support Aboubakar may just liven things up in attack for the hosts. They have never progressed beyond the group stages in the modern era of the Champions League, but would take a giant leap towards doing so with a win here.
24'
C. Tosun enters the game and replaces D. Tošić.
Tošić is unable to shake off the earlier knock he picked up and his match is over. Striker Cenk Tosun replaces him in a tactical reshuffle for the hosts.
22'
CHANCE! Nothing comes of the corner but Besiktas look to make something happen. A cross into the box from the left is met by Aboubakar, but he is unable to keep his volley down.
20'
The hosts relieve the tension on their defence by launching a dangerous attack down the right flank with Quaresma leading the charge. The Euro 2016 winner sends a cross into the area that is well cleared by Maksimovic at the expense of a corner.
18'
Can Besiktas weather the storm? They are facing wave after wave of Napoli attacks at the moment, but are holding firm thus far. The visitors smell blood here...
16'
Meanwhile, there is a worrying sign for Besiktas as Tosic stays down and is in need of attention. Nevertheless, the left-back is soon back on his feet and should be fine to continue here.
14'
Napoli continue to press and a long ball down the touchline is lofted into the box towards an unmarked Callejon. However, the Spaniard gets his technique all wrong and sends a volley way over the crossbar. That was a very good chance and he should have done better.
11'
GREAT SAVE! Having been on the back foot over the past few minutes, Napoli suddenly threaten to snatch the lead on the counter attack. Gabbiadini chases a long ball over the top of the defence and brilliantly cushions it into his stride, but Fabricio shows great reflexes to beat away the powerful strike on goal.
10'
Gunes was visibly unhappy on the touchline as that chance went begging for the Turkish champions. Remember, Besiktas will go top of Group B with a win here, so it is vital that they make the most of their opportunities.
8'
BETTER FINAL BALL NEEDED! The hosts were almost in on goal there! An untimely slip in the Napoli defence gave Aboubakar space to turn and look to find an unmarked Arslan in space. However, he just plays it too close to Reina, who is quick out of goal to gather.
6'
GOAL! BUT IT WON'T COUNT!... Aboubakar chases a long ball downfield and bundles Koulibaly to the ground before smashing past Reina. The referee is having none of it, though, and swiftly blows for a home free-kick.
5'
Besiktas finally enjoy a decent spell of possession. There are no surprises as they take the opportunity to knock the ball around at the back and get a feel for it.
3'
The visitors have not taken long to settle into their rhythm here. They are enjoying plenty of possession and have got into the opposing penalty area on a couple of occasions. The home fans are trying to disturb their flow by booing their every pass.
1'
KICK-OFF! Referee Mark Clattenburg blows his whistle and Napoli get the match underway in a bouncing Besiktas Arena!
Hello and welcome to LIVE text commentary of the UEFA Champions League! We're up to matchday four already and are at the Besiktas Arena today, as the Turkish champions welcome Serie A giants Napoli in Group B.
It promises to be an intriguing battle between the top two sides in Group B. Napoli will progress to the knockout stages with a win providing that Benfica and Dynamo Kiev play out a draw in the other game. Meanwhile, Besiktas will replace the Italians at the summit with three points.
Senol Gunes watched Besiktas earn an impressive 3-2 victory in the reverse fixture at Stadio San Paolo two weeks ago. Both changes made from that starting 11 are enforced with Rhodolfo coming in at centre-half with Dusko Tosic moving over to left-back in place of Caner Erkin, who has been ruled out for the rest of the season with a ruptured achilles. Meanwhile, Gokhan Inler comes into the side to face his former club with Necip Uysal missing out through a calf problem. Oguzhan Ozyakup has shaken off an ankle injury and is on the bench.
Former Napoli striker Gonzalo Higuain came back to haunt his old club by scoring the winner against them for Juventus on Saturday. Maurizio Sarri makes three changes from that defeat with Nikola Maksimovic replacing Vlad Chiriches in the heart of defence, Jorginho comes into midfield in place of Amadou Diawara, while Manolo Gabbiadini is preferred to Dries Mertens in the false number nine role. Arkadiusz Milik and Raul Albiol remain long-term absentees.
NAPOLI (4-3-3): Reina; Hysaj, Maksimovic, Koulibaly, Ghoulam; Allan, Jorginho, Hamsik (c); Callejon, Gabbiadini, L. Insigne.
NAPOLI SUBS: Cabral, Giaccherini, Maggio, Mertens, Zielinski, Chiriches, Diawara.
HERE THEY COME! The players are making their way out onto the field and kick-off is just moments away...
HALF-TIME: BESIKTAS 0-0 NAPOLI
Nothing can separate the two sides at half-time. As expected, both are looking good going forward, but need to be more creative in the final third after the break.
The players are making their way back out onto the pitch and the second half is imminent.
FULL-TIME: BESIKTAS 1-1 NAPOLI
Honours even after an entertaining Group B clash at the Besiktas Arena. Ricardo Quaresma gave the hosts the lead from the spot with 12 minutes remaining, but Marek Hamsik came up trumps for Napoli with a stunning equaliser to rescue a point.
That's all from the Besiktas Arena! Thank you for following the LIVE action of the UEFA Champions League - hope you've enjoyed it. Until next time, goodbye!
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