Manchester United midfielder Nemanja Matic says their performance wasn't good enough for their FA Cup semifinal defeat to Chelsea.

Ole Gunnar Solskjaer's side saw an impressive 19-match unbeaten run in all competitions come to a crashing end at an empty Wembley on Sunday, when Chelsea deservedly secured a 3-1 semi-final triumph.

"We always want to win and it's exactly what we tried today, but this is football," Matic told MUTV.

"You don't win always, sometimes you don't have your day, you don't play well and this can happen.

"But we know what we are playing for, so in the future we cannot allow to concede three goals like we conceded today and I am sure we will learn from this.

"We wanted that final, but Chelsea scored three goals.

"They used their chances and deserved to be in the final, so our focus is on Wednesday against West Ham."