Italian giants Inter Milan were stunned by Trabzonspor as the Turkish stand-ins began their Champions League season with a shock 1-0 win at the San Siro.
The 2009 champions began their Group B campaign against a team only in the tournament because compatriots Fenerbahce had been kicked out due to match-fixing allegations and Ondrej Celustka struck the winner on 76 minutes.
Seydou Doumbia's last-minute strike rescued a 2-2 draw for CSKA Moscow after the Russian side had looked down and out in their Group B opener in Lille. Goals by Moussa Sow and Benoit Pedretti had the French champions well in control after an hour but the Russians hit back with a brace from Doumbia.
Real Madrid made a solid start to their Group D campaign with a hard-fought 1-0 win over Dinamo Zagreb which saw them finish with 10 men. Angel Di Maria's second-half strike earned them the points but the narrow win was tarnished by the dismissal of Marcelo for two bookings in quick succession, the second being handed out for diving.
Ajax and Lyon drew 0-0 in the other Group D game.
Goals by Toni Kroos and Marcio Rafinha guided Bayern Munich to a comfortable 2-0 victory at Villarreal in their opening match in Group A. Kroos opened the scoring in the seventh minute, with Rafinha sealing victory with a little under 15 minutes remaining.
In Group C game, Alexander Frei's late penalty earned Basle an unimpressive 2-1 victory at home to Champions League debutants Otelul Galati. The veteran striker converted from the spot in the 84th minute after Adrian Salageanu was sent off to deny the Romanian minnows a point.
Marius Pena struck a second-half equaliser for the visitors to cancel out Fabian Frei's opener, but they were unable to grab a second leveller after Basle had Benjamin Huggel dismissed at the death.
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