Manchester United captain Nemanja Vidic believes Saturday's Premier League clash against Sunderland is a more important match than last Wednesday's Champions League tie against Shakhtar Donetsk.
The Red Devils sealed a valuable point in Donetsk thanks to a 1-1 draw, but now turn their attention to the Premier League, where they currently find themselves 12th in the table after picking up seven points from their opening six matches.
Rock-bottom Sunderland are up next for David Moyes' side, who will be expected to secure maximum points at the Stadium of Light.
"I think this is actually a more important game," Vidic told ManUtd.com after Wednesday's draw at the Donbass Arena. "Even though it was Shakhtar in the Champions League.
"I think we have to perform well at Sunderland, like we did against Shakhtar, in terms of our defending. With the quality we have up front, we are always able to score goals. I think there's no question about that.
"But we have to defend right and have the right mentality to ensure we can be in a good position."
Sunderland are yet to win a Premier League match this season, but showed signs of improvement during the second half of last weekend's 3-1 defeat to Liverpool under caretaker manager Kevin Ball, who has temporarily replaced the sacked Paolo Di Canio.
United, meanwhile, will be looking to bounce back from last Saturday's shock 2-1 defeat to West Brom at Old Trafford.