David de Gea was left angry by former Manchester United man, Bastian Schweinsteiger, after the latter claimed that Manuel Neuer was better than the Red Devils' current No 1.
Schweinsteiger made the switch to Old Trafford from Bayern Munich in 2015, swapping one international goalkeeper for another. The German international revealed that the Spaniard was eager to know how he compared with his rival, but wasn't pleased with the answer.
"When I first came to Manchester United De Gea said "tell me, am I better than Neuer?' I was like 'no, you're not. It is a different level"," Schweinsteiger told BBC 5Live.
"He was angry, but I explained why. Whenever he had a great game he would ask me again, I would still say he wasn't on that level."
Schweinsteiger also admitted he isn't convinced Ole Gunnar Solskjaer's side can replicate last season's success this term.
"It is the way that you play, what is your strategy," he added. "If you have Cristiano Ronaldo and he takes his breaks from defending, but if he scores you goals in the box, that's what he does and what you have to know.
"If you have centre backs that can't create quality passes like Leonardo Bonucci or David Alaba. Everything is more or less clear. Manchester United are still in progress. Ole Gunnar Solskjaer keeps mentioning that. It takes too long though for me in my eyes.
"It is still not 100 per cent clear to me if Manchester United are going to be successful or not. They have great names like Paul Pogba and Cristiano Ronaldo, and I think that Marcus Rashford will help them a lot in the future because he has been injured. It has not been easy for them.
"But if you compare their football to other teams like Chelsea, Manchester City, Liverpool or even like Bayern Munich it is not on the same level at the moment. United can always hurt you in one game, that is clear to me, especially at Old Trafford."