Wigan manager Roberto Martinez has admitted he is surprised by how fast Robin van Persie has settled in at Manchester United.
Van Persie joined United last month in a £24million move from Arsenal and has scored four goals in three games for his new club, including a hat-trick against Southampton.
Wigan take on the Red Devils this weekend in the Premier League and Martinez believes the 29-year-old is at a level that few others can reach.
"We all know what level Robin van Persie is at. What he did with Arsenal - not many players can reach that level," Martinez told The Wigan Observer.
"Obviously he went to Manchester United, and you're expecting him to take a little bit of time to settle in. But he proves everyone wrong with a phenomenal display against Southampton."
Van Persie suffered a thigh injury while on international duty with the Netherlands on Tuesday night (see Related Articles).