With three Grand Slam and five Masters titles, the world number one ranking, a 70-6 win-loss record and a record prize money haul of $12.6 million, Serb Novak Djokovic was arguably the king of tennis in 2011.

He had been unbeaten in 43 matches in the first half of the season, dating back to the Davis Cup final in Dec 2010, until the run ended against 16-time Grand Slam champion Roger Federer in the French Open semifinals.

The streak brought him the second Australian Open title and all the season’s opening four Masters at Indian Wells, Miami, Madrid and Rome, defeating Rafael Nadal in the finals of all of them.