Manchester United icon Ryan Giggs was impressed by Carlo Ancelotti's work at Chelsea.
Giggs says United welcomed the challenge Ancelotti presented them while at Stamford Bridge.
"Good for him. He's really very good," Giggs told Calciomercato.com. "Honestly, we're pleased that there are obstacles in the Premier League.
"Our manager, Sir Alex Ferguson admires him greatly, and all of us who have dealt with him at Chelsea, we agree with him."