Mourinhos men were embarrassed by a rampant Chelsea side in the Premier League when the sides last met, suffering a 4-0 defeat at Stamford Bridge, Mourinhos first game at the ground since being sacked as Chelsea manager.
Midfield man Fellani feels that despite this, his side will show quality when the two sides meet in the FA Cup quater-finals, and will give Chelsea a far more difficult game than when the teams last met.
United will hope they can turn the tables on Chelsea, as they look to add another piece of silverware to Jose Mourinho’s first season with the club.
“It will be a tough game,” the Belgium international said.
“Obviously we lost there a few months ago, but now it is the FA Cup and we will see what happens.
“It will be tight, I think. It is the FA Cup, it is one game.
“They are top of the league, they have confidence, they have great players, but we will show our quality there and see what happens.
“Of course they are confident but let’s go there and see what we can do.”