Manchester United veteran Ryan Giggs feels more players will go on into their 40's.

Additional research into nutrition, better management of injuries and greater emphasis on the quality of training all help to prolong careers.

"I don't think 50 but you will probably find a lot more players in their late 30s or even their 40s if they look after themselves," the veteran Welshman told MUTV.

"Even though the game is getting quicker, you still need players with a good brain. Yes, there are still quicker players around but that quickness of the brain gives you an extra yard."