Tennis-Calendar Grand Slam possible this year, says Djokovic

Tennis - French Open - Roland Garros, Paris, France - June 13, 2021 Serbia's Novak Djokovic reacts after winning the final against Greece's Stefanos Tsitsipas REUTERS/Benoit Tessier

PARIS (Reuters) - For the second time in six years Novak Djokovic is halfway to a calendar year sweep of all four Grand Slam titles after winning the French Open for a second time on Sunday.

The 34-year-old dug deep into his reserves of resilience to hit back from two sets down against Greece's Stefanos Tsitsipas to win 6-7(6) 2-6 6-3 6-2 6-4 and increase his Grand Slam tally to 19.