Bayern Munich ace Arjen Robben isn't surprised seeing Robin van Persie succeed at Manchester United. Robben can understand why RvP left Arsenal.

"I cannot say I'm surprised, because I know him and his qualities," said Robben. "You have to show your qualities. Not once or twice, but always. The important thing is that he is focused and knows what he wants. Hs mentally is very strong," said Robben.

"For the true Arsenal supporters it was obviously very disappointing that he left the club.

"But on the other hand you should understand his choice. He would also like to win prizes. At Arsenal it is currently very difficult."