Lindegaard four to six weeks with ankle injury

David de Gea is expected to resume duties in goal, if fit for Sunday\'s clash at Chelsea, with Ben Amos also vying for a spot after the youngster made his Premier League debut against Stoke on Tuesday.Tomasz Kuszczak is not seen as an option to play, as he has committed to leaving the club at the end of the season.Ferguson told reporters: \"De Gea should be fit. It looks like Lindegaard will be out for at least four weeks, maybe even five or six. It\'s ankle ligaments. \"Ben Amos has been looking for his opportunity for quite a while and we wondered about sending him out of loan, it\'s not easy when you\'re in Europe as you need three keepers and he did very well the other night.\"We have Tomasz Kuszczak as well but his contract is up in the summer and he doesn\'t want to sign another.\"Lindegaard has conceded just four times in 11 appearances this season while De Gea has struggled to settle in England and has often looked shaky, letting in 28 goals in 20 appearances.