Novak Djokovic has a real shot at becoming the first man in more than 50 years to win all four Grand Slam titles in a calendar year after the Serb added the French Open to his Australian Open title on Sunday, seven-times major winner Mats Wilander said.
The claycourt Grand Slam has been the most difficult major for Djokovic to win, Sunday's victory only his second at Roland Garros, and he heads to Wimbledon next where he is the two-time defending champion.