Legendary Republic of Ireland footballer Roy Keane has regrets about when he called it quits.

The former defensive midfielder won nearly every major trophy with Manchester United, most of them as captain.

However, Keane admits he should have retired after leaving United due to injury, but ended up signing for Celtic.

He told Sky Bet's Stick to Football: “I should have retired when I left Manchester United, the day I left the club.

"I even lost a bit of the love for the game after that.

“I left United and went up to Celtic, my hip was at me, painkillers for training, tore my hamstring two or three times, commuting, thinking I'm 34 now.

"I still had a year left on my contract [at Celtic] and I went to see the hip specialist and they said that the longer I play the worse damage.

"The beauty is that when I rang Gordon Strachan, I told him that I'm finished, I was losing sleep before I rang him but as soon as I put the phone down I had closure on my career, no hesitation, it wasn't a relief but something was lifted off me."