MANCHESTER United manager Sir Alex Ferguson has admitted that he would like goalkeeper David de Gea to bulk up his physique in an attempt to better handle the Premier League game.De Gea has struggled to cope with the physical demands of the English league since his £18 million summer arrival from Atletico Madrid.Sir Alex, however, believes that 21-year-old has all the necessary talent right at his fingertips, he just may require a bigger frame to reach said potential at Old Trafford."The boy has got talent. He’s lightning quick but has just found it difficult to adjust to some parts of the game here,” said the Scot."It’s a matter of developing his frame. He’s doing a lot of work in the gym."If we can get maybe a stone on him without losing any of his flexibility or speed it would be a great boost to him.”De Gea, who committed a string of high-profile errors earlier in the campaign, has impressed in recent weeks following a period on the bench.