WALES flanker Sam Warburton has been forced to retire because of injury.

The 29-year-old returned to pre-season training with Cardiff Blues after neck and knee surgery but felt he wasn’t able to hit his high standards.

It means he has hung up his boots with the final match of his 74-times capped career being the British and Irish Lions Test draw against New Zealand last summer.

Warburton, who captained Wales 49 times and led them to a Grand Slam and Six Nations title, said: "Unfortunately, after a long period of rest and rehabilitation the decision to retire from rugby has been made with my health and wellbeing as a priority as my body is unable to give me back what I had hope for on my return to training.

"I cannot thank the Welsh Rugby Union and Cardiff Blues enough, who have gone beyond the call of duty, in providing the support I received to help me get back on the field, for which I will be forever grateful.

"Since I first played aged 10 at Llanishen Fach Primary School, then Whitchurch High School and Rhiwbina Juniors RFC, I always dreamed of playing for my hometown club the Cardiff Blues, Wales and the British and Irish Lions.

“To look back on my career, I'm extremely proud of what I managed to achieve.

"There are so many people who helped me along the way from schoolteachers, coaches, friends and family. I thank you so much for supporting my dreams and aspirations. I hope they too can take some pride from my career.

"I would like the make special mention of Warren Gatland. Without the faith he had in me and his unwavering support I would never have had the career I was able to pursue.

"Countless people work behind the scenes in professional rugby but I would like to thank to the fantastic medical teams at both WRU and Cardiff Blues who have looked after me throughout my career.

"To my amazing wife Rachel and my close family and friends who have endured the emotional rollercoaster of playing professional rugby, I am so lucky to have such a fantastic support network and loving family to help me get through all the testing times.

"Lastly, to all the many fans, with whom I've shared some fantastic memories with, from the bottom of my heart, thank you so much for all your support.

“From providing a random hug in a supermarket, or simply offering words of support and encouragement, to hearing a cheer after my name was announced at the national stadium, you are what makes playing professional rugby so special and such a privilege. It's been an absolute pleasure to represent you all and an honour I'll sorely miss.

"As one chapter finishes, another begins, which I'll enter with the same level of passion and determination as the last."

Warburton led the Lions on two tours, winning 2-1 in Australia in 2013 and drawing with the All Blacks last summer.

He has spent his entire professional career with Cardiff Blues, making his debut for his hometown region in April 2009.

Just two months later, in June 2009 he made his international debut against the USA in Chicago and in 2010 he was part of the Blues side that won the European Challenge Cup.

Aged just 22, he was named Wales captain for the first time in June 2011 when Wales faced the Barbarians and he then led Wales into the Rugby World Cup later that year.

Gatland, who handed Warburton the Wales and British and Irish Lions captaincy, said: "It is hugely disappointing that Sam has retired from the game.

“He is an outstanding rugby player and he has brought so much to the game on and off the pitch. His leadership, attitude and demeanour along with his performances have placed Sam up there as one of the best and most respected players in the world.

“He finishes with a record that he should be extremely proud of and should look back on his career with huge pride.

"In a Test career full of great moments, one in particular sticks in my mind. His captaincy in the third test for the Lions in New Zealand, in a game finely balanced and potentially historic, was exemplary. The New Zealand media were mightily impressed by him, and rightly so.

"I hope he can take the time to reflect on a magnificent career and I hope he gets as much pleasure from whatever he does next as he has brought to the people of Wales and the wider rugby public."