Novak Djokovic, top-ranked tennis player, will leave the Tokyo Olympics without any medals

Tennis star Novak Djokovic will leave the Olympics without any medals for the third time in a row after he lost two consecutive matches and withdrew from an upcoming match due to a shoulder injury.

Djokovic, the top ranked men's tennis player in the world, lost on Friday to Germany's Alexander Zverev with a final score of 1-6, 6-3, 6-1 in the tournament semifinals. Zverev now will move on to compete for gold against Karen Khachanov from Russia on Sunday. Djokovic's upset defeat knocked himself out of the running to achieve a "Golden Slam" — the rare feat in tennis where a player wins each Grand Slam tournament and an Olympic gold medal during the same year. No man has achieved a Golden Slam since Steffi Graf in 1988, according to CBS Sports.