Borussia Dortmund coach Juergen Klopp has pointed out that Wolfsburg have an excellent team.
"If you invest a lot of money, you are not happy to just play along. Wolfsburg are one of the favourites for the German title in my opinion," Klopp was quoted as saying on the official Dortmund website.
"With last season's top scorer Edin Dzeko and playmaker Diego, Wolfsburg have two world class attacking players in their side. And since it's almost impossible to cut them out of the game, BVB want to give them as little space as possible."
However, Klopp is not planning to change his zonal marking system to keep Diego quiet.
"Since I've been here, we haven't used man-to-man marking. Diego will - depending where he is on the pitch - be up against the two defensive midfielders or the two central defenders. I'd rather have four people with a clear task than one who's tenaciously following another player."