Arsene Wenger accepts Arsenal have made rivals Manchester United even stronger with the sale of captain Robin van Persie, but feels Sir Alex Ferguson is a "bit too confident" with talking up another Treble like in 1999.

Red Devils boss Ferguson believes his formidable frontline next season will be just like it was when Andy Cole, Dwight Yorke, Teddy Sheringham and Ole Gunnar Solskjaer drove them on to domestic success, which was then capped by a remarkable late comeback in the Champions League final against Bayern Munich.

Wenger, though, feels juggling the likes of Javier Hernandez and Danny Welbeck alongside Van Persie and Wayne Rooney will not be as straight forwards as it sounds, and said: "Alex Ferguson is a bit too confident when he says 1999, but of course it increases their potential offensively because they got a world-class players."

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