In the above video you can watch Rafael Nadal in his post match interview at the 2009 French Open tournament in Paris. Nadal is considered one of the best players in the Open era and is widely regarded as one of the most liked player's on the Professional tennis tour.
During the match prior to his press conference Nadal lost a crucial match to Robin Soderling, who entered the contest as the underdog but was able to outplay Nadal from the start. Nadal was the 4 time defending champion and is the most successful tennis player of all time, and after this loss received a large amount of public criticism and speculation that his tight grip on clay court tennis, and tennis in general, was diminishing.
Watch this video to gain a better understanding of how to use your non-dominant hand to your advantage!