Karlovic withdraws from Olympics

Croatian tennis player Ivo Karlovic has withdrawn from the London Olympics due to a foot injury and will be replaced in the men's draw by Germany's Philipp Petzschner.

Karlovic, who is ranked 59th on the ATP Tour, drew Lukas Lacko in the first round, but Petzschner will now take on the Slovakian.

This marks the second straight time the 33-year-old Karlovic has withdrawn from the Summer Games. He also dropped out before the start of the competition four years ago in Beijing.

Petzschner is already representing Germany in men's doubles alongside Christoper Kas, and he may also play mixed doubles with Angelique Kerber.