Javier Hernandez has praised the way team-mate David de Gea is handling the responsibility of being Manchester United's first-choice goalkeeper.
De Gea joined United from Atletico Madrid in the summer after the Spaniard was signed to replace the retired Edwin van der Sar at Old Trafford.
The 20-year-old endured a rocky start to his United career with mistakes against Manchester City in the Community Shield and West Bromwich Albion on his Premier League debut.
However, De Gea appears to be growing in stature with each passing game and impressed in Saturday's 1-1 draw at United's arch rivals Liverpool.
Having also been forced to bulk up to cope with the physicality of the Premier League, Hernandez is watching De Gea do the same and he has been impressed at the application shown by the Spain Under 21 keeper.
"David is an unbelievable player," said Hernandez, who came off the bench to score the champions' equaliser at Anfield.
"He is working day by day and the good thing is that he wants to work.
"He knows that to play in this shirt, first of all, you need to enjoy it. But also he is aware that it is a big responsibility.
"He is handling it very well. He is only 20. He could play for 20 more years if he wants."