Phil Bardsley insists Sunderland must shrug off the defeat by Stoke and focus on dragging themselves out of the drop zone.
Sunderland manager Gus Poyet and his players were incensed after Wes Brown was controversially sent off in the first-half of the 2-0 defeat at the Britannia Stadium.
The Black Cats have appealed the decision, but the result sent them to the foot of the Premier League table, three points adrift of safety.
Defender Bardsley admits the result was hard to take after the recent morale-boosting win over Manchester City, but has urged the team to produce a battling response in Saturday's trip to Aston Villa.
"We need to get to grips with that quite quick," he told Sky Sports News. "Coming off the back of a great result against Manchester City we were full of confidence, as I say, just really disappointed the way the whole game went and the outcome of it. We've got to dig deep.
"We've got a good enough squad here to get out of this scrap. It's up to us.
"It's alright us coming on camera, saying we're going to do this, that and the other.
"It's about when we step over that white line. The weekend was a disappointing result, coming off the back of the Man City win. We need to put that right again."