The second lot of Champions League Matchday 2 for 2016/17 fixtures were completed on Wednesday night.

In Group A, Arsenal controlled proceedings against Swiss champions FC Basel to open their European winning account for the campaign.

Theo Walcott scored a fist-half brace, taking his recent tally to four in three games, as the Gunners turned on the style at the Emirates Stadium before a more subdued second half.

PSG bounced back form their opening game home draw with Arsenal by overcoming Bulgarian minnows Ludogorets Razgrad 3-1.

The French champions fell behind when Nathanael scored for Ludogorets in the 16th minute but rallied through Blaise Matuidi before the break, prior to Edinson Cavani's second-half double saw Unai Emery's men draw equal on points with the Gunners.

The Uruguayan now has eight goals in his past five outings in all competitions, including three in the group stage of the UCL.

Group B saw Besiktas held to 1-1 draw by Dynamo Kyiv despite Ricardo Quaresma opening the scoring with a stunning 25-yard free-kick. Viktor Tsyhankov responded for the Ukrainians in the 65th minute as Besiktas tallied their second point of the group stage, and Kyiv their first.

In Italy, Napoli scored three goals in seven second-half minutes to take a four-goal lead over Benfica before the Portuguese outfit netted two late consolation goals.

Marek Hamsik opened the scoring on 20 minutes before a brace from Dries Mertens, either side of a Arek Milik penalty, had Maurizio Sarri's Napoli in cruise control but Goncalo Guedes and Eduardo Salvio ruined what could have been a perfect night for the home team.

Group C threw up a couple of dramatic matches which saw Barcelon come from behind to beat Borussia Monchengladbach 2-1 in Germany.

Thorgan Hazard scored his first Champions League goal to give Borussia a 34th-minute lead before Luis Enrique's Lionel Messi-less Barca kicked into gear with second-half goals from Arda Turan and Gerard Pique.

In Scotland, Celtic stunned Manchester City with a 3-3 draw at Celtic Park, despite leading on three separate occasions.

Moussa Dembele gave the Bhoys an early lead with his first Champions League goal before Fernandinho struck back in the 11th minute. An unfortunate deflection from Raheem Sterling saw Celtic back in front but the winger atoned for his error by levelling on 26 minutes.

Dembele grabbed his second of the night early in the second half before Nolito again equalised for City in the 55th minute, eventually settling for a point after winning 10 in a row under Guardiola.

And in Group D, last season's finalists Atletico Madrid edged German powerhouse Bayern Munich 1-0 thanks to Yannick Ferreira Carrasco's first-half cracker.

Bayern pressed for an equaliser but were unable to find the back of the net as Atleti spurned a great chance to kill off the contest late only for Antoine Griezmann to hit the crossbar from the penalty spot.

And FK Rostov picked up their first-ever point in Europe's top flight with an unlucky 2-2 draw with PSV Eindhoven at home.

A double from Dmitry Poloz, either side of Davy Propper's 14th-minute leveller, had Rostov ahead by the 37th minute and despite dominating the contest, conceded a second goal when Luuk De Jong headed home on the stroke of half-time for PSV's 100th goal in their 100th UCL appearance.

PSV were awarded a penalty in the 57th minute when De Jong was brought down but a missed penalty from Propper cost Phillip Cocu's side all three points, having missed from 12 yards in their narrow defeat to Atleti a fortnight ago.

2016/17 UEFA Champions League - group stage scores

Group A

Ludogorets Razgrad (BUL): 1 (Natanael 16')
Paris Saint-Germain (FRA): 3 (Blaise Matuidi 41', Edinson Cavani 56'/60')
Vasil Nevski National Stadium, Sofia, Bulgaria - 17,155

Arsenal (ENG): 2 (Theo Walcott 7'/26')
FC Basel (SUI): 0
Emirates Stadium, London, England - 59,993

Group B

Besiktas (TUR): 1 (Ricardo Quaresma 29')
Dynamo Kyiv (UKR): 1 (Viktor Tsyhankov 65')
Vodafone Arean, Istanbul, Turkey - 33,938

Napoli (ITA): 4 (Marek Hamsik 20', Dries Mertens 51'/58', Arek Milik (PEN) 54')
Benfica (POR): 2 (Goncalo Guedes 70', Eduardo Salvio 86')
Stadio San Paolo, Naples, Italy - 41,281

Group C

Borussia Mönchengladbach (GER): 1 (Thorgan Hazard 34')
Barcelona (SPN): 2 (Arda Turan 65', Gerard Pique 74')
Borussia-Park, Mönchengladbach, Germany - 46,283

Celtic (SCO): 3 (Moussa Dembele 3'/47', Raheem Sterling (OG) 20')
Manchester City (ENG): 3 (Fernandinho 11', Raheem Sterling 26', Nolito 55')
Celtic Park, Glasgow, Scotland - 57,592

Group D

Atletico Madrid (SPN): 1 (Yannick Ferreira-Carrasco 35', missed penalty: Antoine Griezmann 84')
Bayern Munich (GER): 0
Vicente Calderon, Madrid, Spain - 48,242

FK Rostov (RUS): 2 (Dmitry Poloz 8'/37')
PSV Eindhoven (NED): 2 (Davy Propper 14', Luuk De Jong 45+2', missed penalty: Propper 57')
Stadion Olimp 2, Rostov-na-Donu, Russia - 12,646