Australian dynamo Nick Kyrgios pulled out of the French Open on Sunday after failing to shake off a persistent elbow injury that has troubled him in recent weeks.

The burly 23-year-old had looked untroubled when sauntering into the grounds of the Roland Garros stadium at around 11am local time on a bright and sunny Parisian morning, but just a handful of hours later his tournament was over.

"Sorry guys, I tried everything I could to be ready... but I came up short," Kyrgios wrote in a message on Twitter, adorned with tearful emojis.

He attached a picture of a more formal note.

"Unfortunately I have to withdraw from this year's French Open," Kyrgios's note said. "Having consulted with my team and medical experts it is deemed too risky for me to step out and potentially play five sets on clay especially as I have not played a singles match in nearly two months.