Sir Alex Ferguson is backing David De Gea to demonstrate the turnaround in his fortunes when he again faces Blackburn Rovers - the side who gave him a New Year\'s Eve hangover earlier this season. The Spanish goalkeeper has played every game for United since the start of February, a run that has helped him build his confidence after a baptism of fire culminated in Rovers\' shock 3-2 defeat at Old Trafford on 31 December. Some of De Gea\'s performances in the last two months have proved pivotal in tight wins against the likes of Norwich City and most recently Fulham. \"It took David time to adapt to the different ways of the English game as opposed to the Spanish game,\" admitted Sir Alex on Thursday. \"The area where he was being criticised really was his aerial ability in the box. In the Blackburn game at Old Trafford, he should have dealt with the last corner kick better. He knew that. He has addressed that area and it’s a great improvement.’ \"He didn’t let it [the criticism] get to him and the boy has just improved with every game. He’s playing with confidence. \"The other night, he made two or three really terrific punches and blocks when Fulham started to propel the ball into the box. This showed the fantastic improvement he has made.\"