Zhang Jike

Zhang Jike (simplified Chinese: 张继科; traditional Chinese: 張繼科; born 16 February 1988 in Qingdao) is a Chinese table tennis player. He became the world champion in 2011 and 2013. In 2012 he won the Olympic Games. Zhang is the fourth man in history to win the Grand Slam.
Career.
In 2006 Zhang Jike came into the National Team. After two years he become the Chinese Master in the Singles. His first World Championship that he played, was 2011 in Rotterdam. Zhang came into the final and beat Wang Hao with which he became World Champion in singles. In the same year he won the World Cup, where his opponent was Wang Hao again. He is the third player in history after Jan-Ove Waldner and Jorgen Persson, who won these important titles in one year. In 2012 Zhang Jike was nominated for the Olympic Games in London. He competed in singles as well as team competitions, where he won gold in both. From June to December 2012 he was the number 1 in the world, because he won the Olympic Games in the singles. 
In the final at the World Championships 2013 Zhang played against Wang Hao and defended his title after defeating him. In 2014 he won the World Cup for second time. His final-opponent was Ma Long. At the WTTC 2015 he won bronze in the singles and gold in the doubles with Xu Xin. In the semifinals in the singles category he lost to Fang Bo. During this year he lost unusually often against non-Chinese players. Nevertheless, he was nominated for the Olympic Games 2016. Here he won the silver medal in singles and with the team the gold medal. At the Asian Cup in the same year he lost to Xu Xin the final at the singles category. In the Chinese Superleague 2016 he didn't play. In 2017 he had to stop because of a fever in the second round. At the World Championships he came to Round 32 only.
At the Asian Championships in the same year he came into the semifinals and won with the team the gold medal. At the China Open he lost at the Round of 32. And didn't play the year anymore. That's why in 2018 he was only ranked 78th, the lowest since 2008.