Former Chelsea coach Gwyn Williams sees nothing untoward in Roman Abramovich ruthless managerial policy.

Williams worked at Chelsea as coach, scout, technical director and assistant manager for 26 years under both Ken Bates and Abramovich before rejoining Bates at Leeds United in 2006, where he is the club's technical director.

"It's only regarded as strange in British football. In Europe, it's normal for a director of football to buy players and leave the manager to coach them. A club need to know their new player will be a good investment whoever the manager is," he told the Mail on Sunday.

"If every player you signed was fantastic, life would be easy. But Roman is not afraid of the hiccups and keeps moving forward. He is ambitious and needs to be. He is a wealthy man but also a clever man."