Grigor Dimitrov withdraws from Porto tournament

Grigor Dimitrov has withdrawn from the Challenger 125 tournament in Porto due to a left knee injury, just hours before his scheduled first-round match against Daniel Rincon.

The Bulgarian was due to face the Spaniard on Monday afternoon after receiving a wild card for the main draw. Dimitrov had been seeded ninth and was looking to gain more match practice after his first-round defeat in Saint-Tropez last week.

The 35-year-old has now been replaced in the draw by a lucky loser from qualifying. There is currently no clear information on the severity of Dimitrov's injury or how long he could be sidelined.