Australian Nick Kyrgios pulled out of the Rome Masters on Tuesday, citing a hip injury.

The world number 18 was replaced in the draw by lucky loser Alexandr Dolgopolov.

There are now fears that Kyrgios might not be fit for the start of the French Open on May 22.

The 22-year-old reached the Roland Garros third round a year ago.

Kyrgios was treated for a hip problem last week in Madrid.