Manchester United manager Jose Mourinho referenced tennis legend Roger Federer when discussing the need for his side to adapt to Young Boys' artificial pitch in the UEFA Champions League on Wednesday.
In Tuesday's press conference, the Portuguese said the synthetic surface at the Stade de Suisse will not be used as an excuse if United play poorly as, like Federer, the Red Devils should be able to play on different pitches, per Simon Jennings of the Evening Standard:
"I don't want to use [the artificial pitch]... as a possible excuse for a poor performance.