"I think this is the best period of my career," said De Gea, whose form has not gone unnoticed by Real Madrid. I am playing the best football that I’ve ever played.
"I’m really enjoying it at the moment and I’m just trying to improve with every training session and every game that goes by, giving 100 per cent and concentrating to the maximum. That’s the way I want to continue."
De Gea let a rare brace in last weekend as United lost 2-1 to Swansea.
The 24-year-old hopes the team will return to winning ways against Sunderland at Old Trafford on Saturday.
"We were on a good run of results and winning some important games but, the other day at Swansea, we lost the game," De Gea said.
"I don’t think we deserved to lose, but football can be like that.
"You go to tough away grounds and you lose points sometimes. We have to move on from that as now we face Sunderland and we need to concern ourselves with that test."