New Hamburg chief Frank Arnesen says Chelsea owner Roman Abramovich is a football expert.
Arnesen left Chelsea this year as football director to take charge of HSV.
He said: "When I first met him [Abramovich] in 2005, he had little clue about football.
"However, he has put a lot of energy into the club and this has changed. If Abramovich wants something, he goes for it 100 per cent. Now he really knows his stuff."
It's kicking off again! Click here for your No1 source for Chelsea transfer market news and gossip.