Nemanja Matic said the mood in the Manchester United dressing room 'wasn't great' following their drab goalless draw with Crystal Palace on Wednesday night.
The Serbian midfielder also believes United need to take more risks in attack after they were held to their third consecutive goalless draw in all competitions.
Despite dominating possession Ole Gunnar Solskjaer's side never looked like scoring at Selhurst Park as they failed to capitalise on Leicester's dropped points earlier in the day.
The draw left United second in the Premier League, 14 points behind leaders Man City ahead of their derby encounter this weekend.
Solskjaer's side will need a much improved performance when they travel to the Etihad on Sunday afternoon and Matic knows his side need to start being braver with their attacking play.
“Palace played solid compact football," the Serbian midfielder told Sky Sports. "They waited for their chances. They had an opportunity to win the game at the end. We have to do much better, we have to risk more in attack to create more chances.
“We are Manchester United, we have to win this kind of game. On Sunday we have a big game against Manchester City. We have to refocus for that.
“When we don’t win we are frustrated. The feeling in the dressing room wasn’t great. If we need to take some positives, it’s a clean sheet.”