PSG host Real Sociedad in the Champions League round of 16 on Wednesday. Former coach of the Basque club, Philippe Montanier, deciphers the tactical challenge.

“Both teams will want to have the ball, one of the keys to this double confrontation will be played out there,” he says. Imanol Alguacil must deal with several injuries and major uncertainty before challenging PSG, whose team remains in four matches without winning… or scoring, three 0-0s.