The Serbia defender has reached the Champions League semi-finals and won the Premier League in all three full seasons he has spent with United.
"I believe and hope we can find some energy," he told Key 103 radio. "We need to rediscover that winning mentality.
"We need to stick together and we need to play like a team.
"The last few games have been hard. They have been emotional.
"But we are in this position now and we need to deal with it the best we can."