Sir Alex Ferguson has admitted he is uncertain over the future of Nemanja Vidic. The central defender is currently resting after playing for Serbia at the World Cup and when asked about speculation that the 28-year-old may leave Old Trafford, Ferguson said: "I can't clarify it at all."

When pressed and asked whether the Serb would play for the Manchester team this season, Ferguson replied: "I believe so."

Vidic has been linked with a move to Spain for some time now but has remained loyal to Ferguson and Manchester United so far. He said last season that he had "every intention" to see out his contract at United, which runs to 2012. The defender and the team's other World Cup participants are expected to join up with the rest of the squad for the friendly against an Airtricity League XI in Dublin on Wednesday 4 August.

United beat the Philadelphia Union 1-0 last night in a scrappy game against Major League Soccer's newest team. The winning goal came in the 76th minute after Danny Welbeck intercepted a sloppy pass in midfield and ran straight through the defence before passing to Gabriel Obertan to score. Dimitar Berbatov nearly extended United's lead, hitting the crossbar from close range in the 80th minute.