Zhang became the fourth male player in the history of table tennis to achieve a career Grand Slam when he won gold in men's singles at the Olympic games in London 2012. The first three are Jan-Ove Waldner (in 1992), Liu Guoliang (in 1999), and Kong Linghui (in 2000). Zhang won the Grand Slam in only 445 days. He won, consecutively, first WTTC 2011, then World Cup 2011, and then London Olympics 2012, which made him the fastest player ever to win a Grand Slam. After the first Grand Slam, he won WTTC 2013 and World Cup 2014, which makes him the player who is closest to achieve a second career Grand Slam. He is one of the three male players who hold the most major titles in the table tennis history, at five. He is the only one who won 5 major titles in a row in the table tennis history.