Marseille 0-2 Bayern Munich: Bayern show no mercy
Gomez put Bayern ahead with his 11th goal of the competition just before half-time, with Marseille goalkeeper Elinton Andrade to blame for letting the ball slip under his body.
Robben scored a clinical second in the 69th after a quick one-two with Thomas Mueller.
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Hide AdOut of form, hampered by injuries and suspensions, and jeered by their own fans, Marseille barely tested Bayern keeper Manuel Neuer at Stade Velodrome as they slipped to an eighth defeat in nine games.
Marseille: Andrade, Azpilicueta, Fanni, N’Koulou, Morel, Diarra (Cheyrou 71), M’bia Etoundi, Amalfitano (Brandao 68), Valbuena, Andre Ayew, Remy. Subs not used: Bracigliano, Gignac, Kabore, Traore, Jordan Ayew.
Bayern Munich: Neuer, Lahm, Boateng, Badstuber, Alaba, Gustavo, Kroos (Tymoschuk 63), Robben, Muller (Schweinsteiger 70), Ribery (Pranjic 78), Gomez. Subs not used: Butt, Olic, Rafinha, Contento.