Ashley Cole last night retired from international football after being left out of England's World Cup squad - a decision Roy Hodgson admits was one of the hardest of his career.

The fight for the Three Lions' left-back berth has been one of the most interesting in the build-up to this afternoon's announcement of the 23-man squad heading to Brazil.

With Leighton Baines' place all-but certain, it was seen as a straight fight between 33-year-old Cole and Saints teenager Luke Shaw - a battle the latter has almost certainly won.

The Chelsea full-back was informed last night that he had not made the cut and, after collecting 107 caps, took to Twitter to announce his international retirement with immediate effect.

"I got the call from Roy and agree England team should be about the young players," Cole said via his account, @TheRealAC3. "I think it best I retire from England team now.

"We have a great manager and team and I wish them only success. I will be supporting them like a true fan. Thanks to everyone for everything #Baines and #shaw are great players, proved this season, and are the future of this country, it was a pleasure to get #107 caps #eng "Like me or not, trust me it's hurt me to stop playing for my country #proud and #honoured"

The timing of the information's leak is unlikely to please Hodgson, who names his 23-man party for South America today at 2pm in Luton.

However, the England boss was quick to make a statement praising Cole and highlighting the difficulty of the decision.

"Among many difficult decisions I've had to make for my squad, not selecting Ashley was one of the hardest," Hodgson admitted.

"He's been an incredible competitor for England, to amass over a century of caps is a truly staggering achievement and he deserves enormous credit for the desire and brilliance which has shone through over the years he has represented his country.

"There are few players who can be considered among the very best in the world, but Ashley in his prime was the best left-back without question."

Cole may not be the only big-name player to miss out on the 23-man squad, which is being announced at the home of England sponsor Vauxhall.

The pressure is mounting on Chelsea team-mate Frank Lampard, who has 103 caps to his name but could be hit by the emergence of Jordan Henderson and Ross Barkley.

Barkley, Shaw, Henderson and Liverpool teenager Raheem Sterling have breathed fresh optimism into England fans' hopes for Brazil, where Hodgson believes they can make an impact as well as gaining invaluable experience.