Manchester United defender Nemanja Vidic is ready for a showdown with Arsenal's attack in their Champions League semifinal.

Vidic is preparing to face Emmanuel Adebayor and Robin van Persie and said: "Adebayor and van Persie are very difficult forwards to play against. They are great players.

"They have speed and they have the eye for a goal. We need to be fully concentrated for 90 minutes if we are to stop them.

"Arsenal are in good form and scoring goals again. They have a lot of quality, especially up front.

"There won't be any surprises for either team because we both know everything about each other."