Borussia Dortmund coach Jurgen Klopp admits he's in awe of Manchester United striker Robin van Persie. Klopp rates the Dutchman among the best players in the game.

"When we played against Arsenal in London, I saw the best striker ever: Robin van Persie," Klopp enthuses. "I did not know that a player could play three positions for ninety minutes.

"It was a great experience."