Derby caretaker boss Wayne Rooney is delighted son Kai has signed for Manchester United.

Kai, 11, put pen to paper on a youth contract at Old Trafford earlier this week and his proud dad admitted he could have gone elsewhere.

Rooney said on Friday: "Yeah I'm a proud dad.

"He's been working hard, he obviously came over to the States with us to continue with his football.

"He went on trial with Manchester United and he's impressed the coaches. He signed his forms yesterday so I'm delighted for him."

He added: "He did have other options, other clubs to go to but he decided he wants to sign for Manchester United, so it was his decision and not mine."