Former Manchester United chief Peter Kenyon rates Jose Mourinho's appointment the biggest signing in their history.
United's executive vice-chairman Ed Woodward hailed his new manager as the "best in the world" - and it was a view echoed by Kenyon, who brought Mourinho to Stamford Bridge in 2004.
"Quite simply, they're getting the best manager coaching in football today," Kenyon told Sky Sports. "His track record speaks for itself.
"When I appointed him, I was looking to bring a winning mentality to what was already a good team. Jose brought that immediately, which led to the first title in 50 years, in that first season - that's the ability he has.
"He's got a great ability to make good players better, so I think the current players at Manchester United will be better under Jose Mourinho, for sure."