Atletico Madrid goalkeeper David de Gea confirmed on Tuesday that he has received an offer from Manchester United, who are looking for a replacement for Edwin van der Sar. \"I have been invited by MAU (sic) to see the club and the city together with my family and to be given an offer,\" the 20-year-old wrote on his official Twitter account. His comment comes a day after the Daily Mail newspaper published a photo of the Spaniard entering a medical facility in Manchester where he reportedly underwent a medical examination. \"We\'ve been working on it (the De Gea transfer) for quite a while. We identified him quite a while back as one we should go for,\" United manager Sir Alex Ferguson said last month. \"He\'s a young goalkeeper, very quick, good composure, presence and an outstanding replacement for (Edwin) van der Sar. \"We were looking for the same type of qualities as Edwin, because the one great quality Edwin always had was his composure and organisational ability. \"With David De Gea, he is very similar that way.\" De Gea, 20, has already won the Europa League and UEFA Super Cup with Atletico and was part of the Spain side that enjoyed victory at the Under-21 European Championship in Denmark earlier this month. He was named in the provisional 30-man senior squad for last summer\'s World Cup in South Africa, which Spain won, but missed the cut when coach Vincente del Bosque reduced his list to 23 players. Van der Sar retired from football at the end of the 2010-11 season.