Groups E to H were in action in the UEFA Champions League on Tuesday night.
In Group F, Arsenal kept their qualification hopes alive by defeating Dinamo Zagreb 3-0 at the Emirates Stadium.
Alexis Sanchez scored a double after supplying Mesut Ozil's opener as Arsene Wenger's Gunners moved within three points of second-placed Olympiakos who they take on in Athens in the final group stage fixture on December 9.
In the other group encounter, German giants Bayern Munich easily accounted for Olympiakos with a 4-0 result at the Allianz Arena courtesy of goals from Douglas Costa, Robert Lewandowski, Thomas Muller and Kingsley Coman.
Chelsea went top of Group G thanks to a largely unconvincing yet comfortable 4-0 win over ten-man Maccabi Tel Aviv in Haifa.
Goals from Gary Cahill, Willian, Oscar and Kurt Zouma allowed Jose Mourinho's Blues to get past the Israelis who had lost defender Tal Ben Haim to a red card just before half-time.
Chelsea replaced FC Porto at the helm of the group after the Portuguese side were beaten 2-0 at home by Ukraine's Dynamo Kyiv, forcing qualification for the Round of 16 to the final set of group stage fixtures which will see Chelsea host Porto and Kyiv at home to bottom-placed Tel Aviv.
Barcelona produced a dazzling display at Camp Nou in hammering AS Roma 6-1 in Group E with Luis Suarez and Lionel Messi both scoring braces, assuring their place in the knockout phase for yet another season, as BATE Borisov held Bayer Leverkusen to a 1-1 draw in Belarus which keeps all other three teams in with a chance of finishing second.
And in Group H, Zenit Saint Petersburg progressed to the Round of 16 courtesy of a 2-0 home win over Valencia as Gent defeated Lyon 2-1 in France with a last-gasp Kalifa Coulibaly goal to move into second position ahead of their final fixture against the Russians.
2015/16 UEFA CHAMPIONS LEAGUE - GROUP STAGE SCORES
Group E
BATE Borisov (BLR): 1 (Mikhail Gordeichuk 2')
Bayer Leverkusen (GER): 1 (Admir Mehmedi 68')
Borisov Arena, Borisov, Belarus - 12,601
Barcelona (SPN): 6 (Luis Suarez 15'/44', Lionel Messi 18'/60', Gerard Pique 56', Adriano 77')
AS Roma (ITA): 1 (Edin Dzeko 90+1')
Camp Nou, Barcelona, Spain - 71,433
Group F
Arsenal (ENG): 3 (Mesut Ozil 29', Alexis Sanchez 33'/69')
Dinamo Zagreb (CRO): 0
Emirates Stadium, London, England - 58,978
Bayern Munich (GER): 4 (Douglas Costa 8', Robert Lewandowski 16', Thomas Muller 20', Kingsley Coman 69')
Olympiakos (GRE): 0
Allianz Arena, Munich, Germany - 70,000
Group G
FC Porto (POR): 0
Dynamo Kyiv (UKR): 2 (Andriy Yarmolenko (PEN) 35', Derlis Gonzalez 64')
Estadio do Dragao, Porto, Portugal - 31,220
Maccabi Tel Aviv (ISR): 0 (red card: Tal Ben Haim 40')
Chelsea (ENG): 4 (Gary Cahill 20', Willian 73', Oscar 77', Kurt Zouma 90+1')
Sammy Ofer Stadium, Haifa, Israel - 29,121
Group H
Zenit Saint Petersburg (RUS): 2 (Oleg Shatov 15', Artyom Dzyuba 74')
Valencia (SPN): 0 (red cards: Ruben Vezo 80')
Petrovsky Stadium, Saint Petersburg, Russia - 17,002
Lyon (FRA): 1 (Jordan Ferri 7')
Gent (BEL): 2 (Danijel Milicevic 32', Kalifa Coulibaly 90+5')
Stade de Gerland, Lyon, France - 30,206
