Between hopes of qualification, shocks at the top and internal crises, the 6th day of the Champions League, which is played Tuesday and Wednesday, promises to be crucial for several clubs. Olympique de Marseille is playing for its European survival at Union Saint-Gilloise, while PSG wants to confirm its good momentum in Bilbao. The Real Madrid – Manchester City duel promises a new prestigious poster, while Liverpool will do without Mohamed Salah against Inter.