The last time Novak Djokovic went two full years without a Grand Slam title was back in 2009 and 2010, when the tennis ace was at the beginning of his illustrious career. Djokovic had just one Slam title to his name then, but the Serb now boasts a record 24, with No.25 still in his sights.

24-time major winner Novak Djokovic has withdrawn from the Cincinnati Open with the start of the tennis calendar's final major, the US Open, about three weeks away, a tournament official confirmed to the New York Times Monday.

Novak Djokovic has pulled out of the Cincinnati Open for what officially was listed as a “non-medical” reason. Monday's withdrawal means he will head to the U.S.