Borussia Dortmund and Chelsea recovered from poor starts in the Champions League by winning their first group matches on Tuesday, while Barcelona beat 10-man Celtic 1-0 to avoid a second consecutive loss at Celtic Park. (All AFP and AP images)
Robert Lewandowski scored a brace as Dortmund, last-season's runner-up, defeated Marseille 3-0 in Group F. Arsenal leads the group with six points after a 2-0 win over Napoli.
Chelsea kick-started its campaign with a 4-0 rout of Steaua Bucharest in a Group E dominated by Schalke. Julian Draxler made sure the German side maintained its 100 percent record this season with a superb half-volley that earned his side a 1-0 win at Basel, where activists protesting against Champions League sponsor Gazprom abseiled from the stadium roof and forced the match to be briefly suspended.
Fernando Torres though injured his knee just 11 minutes into the game and went off, giving Jose Mourinho some blues over his immediate future.
At the Emirates, Mesut Ozil again proved to be an excellent signing for Arsene Wenger's team as the Gunners took command of the group, three points clear at the top ahead of Dortmund's visit on Oct. 22.
Ozil's first goal since becoming Arsenal's most expensive player and another strike from Olivier Giroud within the opening 15 minutes were ideal presents for Wenger, who celebrated 17 years in charge at the London club.
In Porto, Turan scored the winner four minutes from time as Atletico Madrid rallied to secure a 2-1 win.
The result sent the Spanish club to the top of Group G, three points clear of Porto. Zenit St. Petersburg and Austria Vienna drew 0-0 in the other group game and have one point each.
In another group H match, Mario Balotelli converted a penalty in the fourth minute of injury time to give AC Milan a 1-1 draw against Ajax.