(Reuters) - A collision with an on-court camera spelled disaster for world number two Daniil Medvedev, who lost 6-2 3-6 3-6 to fellow Russian Andrey Rublev in their Cincinnati semi-final.

The compatriots were tied 1-1 in the second set when Medvedev crashed into an on-court camera and knocked it to the ground while chasing the ball at the baseline. Medvedev offered his hand to the camera operator as the chair umpire walked over to make sure both were okay.