The Gunners have slipped eight factors adrift of the top-four after successful simply one in all their final six Premier League fixtures.
The dismal run underneath former PSG and Sevilla boss Emery has sparked hypothesis over his future, lower than 18 months after he changed Arsene Wenger within the Emirates hot-seat.
But Gunners legend Vieira has backed Emery to flip issues round at Arsenal and urged his former membership to be affected person.
‘It’s true Arsenal are going by a tricky spell,’ the previous Arsenal captain mentioned. ‘But I haven’t watched all their matches, so I can’t discuss their recreation.
‘They have a coach who is qualified and who works well. When a club is having a difficult time, it’s essential to be united.
‘I believe he has sufficient expertise to get them by this tough spell. We have to get behind him and provides him time to change issues.
‘I am not sure a change of manager will fix the problems.’
Gary Neville, the previous Manchester United and England defender, additionally believes Emery deserves extra time at Arsenal.
He instructed Sky Sports: ‘Arsenal are what they are. They’re a frustration. Emery is being put underneath huge stress.
‘I do know that Emery is a good coach and following on from Arsene Wenger was by no means going to be simple. Great coaches will come into Arsenal and battle to change issues there.
‘We’ve seen that at Manchester United when Sir Alex Ferguson left. Ferguson and Wenger had been the leaders at these golf equipment. It’s going to take time and there wants to be persistence proven at Arsenal.
‘Manchester United and Arsenal are both big clubs, huge clubs, and they will get back, the cycle will turn.’