Manchester United boss Sir Alex Ferguson says Ryan Giggs has at least another two years of top-flight football inside his 36 year-old legs.

Giggs scored his 100th Premier League goal during the 4-1 win at Fratton Park, with Wayne Rooney grabbing a hat-trick including two penalties.

With Giggs turning 36 on Sunday, Ferguson said: "He's an exceptional player. A rarity. He will play for two years yet.

"Happy Birthday. He's had it 36 times in his life, wait until he gets to 67. I think he'll be retired by then."