Novak Djokovic’s amazing consistency and powerful performances are well-known to the tennis world. Though the Serbian tennis star has been the image of resilience for almost 20 years, with fortitude pushing through the most difficult games and still a mainstay at the top of the sport,

Novak Djokovic has suffered four opening-round losses in his last five tournaments, with the latest defeat coming at the hands of Matteo Arnaldi in Madrid.

Novak Djokovic couldn't hide his disappointment after crashing out of the Madrid Open following a shocking loss to Matteo Arnaldi. The 37-year-old went down 6-3, 6-4 to the unseeded Italian and admitted afterwards that he may have played at the tournament for the final time.