Wimbledon: Rafael Nadal's calendar Slam bid faces Novak Djokovic challenge on grass
Novak Djokovic who is bidding to extend his domination at the grasscourt major. For the first time in his career, the Spaniard has won the Australian and the French Open back-to-back and has the chance to become the first man to win all four majors in the same year since Rod Laver achieved the feat in 1969. Serbian Djokovic finished one match short of accomplishing it last season when he won the first three Grand Slams but lost to Russian Daniil Medvedev in the U.S.
