Justin Engel has enjoyed a breakthrough start to his fledgling tennis career and has his sights set on one player in particular as he looks to reach the top of the sport.

Novak Djokovic has made a heartfelt plea to his long-time rival, Rafael Nadal, asking him to reconsider his planned retirement after defeating the Spanish legend in a highly anticipated exhibition match at the "Six Kings Slam" in Saudi Arabia.

Rafael Nadal was presented with a solid gold tennis racket complete with golden strings as he played the final singles match of his remarkable career. Fittingly, he played against his greatest rival Novak Djokovic in the Six Kings Slam exhibition in Riyadh,

The great rivals contested a record 60 competitive clashes during their careers, with Djokovic leading 31-29, but there will be no more after Nadal announced last week he will retire following the Davis Cup Finals in Malaga next month.

Novak Djokovic claimed a final win over Rafael Nadal as the two brought an end to one of sport's great rivalries at the Six Kings Slam exhibition in Riyadh on Saturday night. The two tennis legends contested a record 60 competitive clashes during their careers,