Juan Mata insists Manchester United needed to win Tuesday night's Champions League clash with CSKA Moscow.

The Red Devils ran away 2-1 winners thanks to second-half goals from Marcus Rashford and Romelu Lukaku.

Despite having already qualified for knock-out stage prior to kick-off, Mata says the win was important for momentum and confidence ahead of the Manchester derby on Sunday.

"We needed to win, we only needed a point, but we always want to win," he said.

"We are so happy, we face the weekend game with good momentum.

"It is important to win for your confidence level, Sunday is a big game (against Manchester City), we know how important it is, tomorrow we rest then on Thursday we will think about the game and hopefully we can get the three points."