Serena Williams has just been stunned by Elina Svitolina at the Rio 2016 Olympics.

Serena Williams had just been stunned by Elina Svitolina at the Rio 2016 Olympics.

Williams was beaten in the third round of the game in Rio by a player she had never lost to in their four previous meetings.

Williams went down by a score line of 6-4, 6-3.

Svitolina, ranked 20th in the world, was beaten 6-1 6-1 by Williams in their last meeting, on clay, at the French Open in June.