De Gea has conceded that this weekend's clash against high-flying Everton will prove a stern test for United.
The Spaniard told the club's website: “They are playing very well, like l said.
“They have signed some very good players and they are scoring a lot of goals.
“It's a very good team and it's always difficult to play against Everton away to be honest, so we need to be very focused, train well and be 100 per cent ready to play against them."
He added: “To be honest [a win] would be the best present for me if we beat Everton on my 30th birthday.
“It will be a tough game for sure. They have a good manager and good players and they are playing very well. We need to be ready for the game."