Chung out of French Open with ankle injury

Australian Open semi-finalist Chung Hyeon has pulled out of the French Open with a persistent ankle injury.

Tipped as one of the few contenders capable of beating Rafa Nadal at Roland Garros this year, Chung said in a tweet that he had also withdrawn from this week's Lyon Open.

"Unfortunately I had to withdraw from Lyon yesterday and now Roland Garros," the 21-year-old said.

"I have been struggling with an ankle injury during the entire clay season. An MRI scan has revealed that I have build up of fluid in the ankle joint which might require a small procedure and then and extended period of rest."

Chung was the fairytale story of the Australian Open in January, storming past Novak Djokovic and Alexander Zverev before having to retire hurt against Roger Federer in the semi-final.