Rafael Nadal will have one final battle with Novak Djokovic when they meet in the Six Kings Slam exhibition event on Saturday. The Spaniard is retiring after next month's Davis Cup finals in Malaga, bringing the curtain down on an incredible career.

Tennis wonderkid Justin Engel has pleaded with Novak Djokovic to avoid retirement for the time being. The German recently followed in the footsteps of Carlos Alcaraz by becoming an extremely young winner on the ATP Tour and he wants to face idol Djokovic before the tennis icon bows out of the sport.

In a recent interview with DAZN Sport, the 22-time major champion was asked to push the conversation further and compare the rivalries between him, Federer and Djokovic to the new rivalries being made between young players in tennis—like the battles between Carlos Alcaraz of Spain and Jannik Sinner of Italy.