to win his only Grand Slam title at the 2009 US Open. He again refused to update his racquet to the Wilson BLX Juice Pro in 2012, and in 2014 had only a few K-Factor racquets left. For strings, he uses Luxilon ALU Power strung at 58 lbs. He currently makes use of the same racket painted to resemble the Wilson ProStaff 97. His clothing sponsor is Nike. He used to wear sleeveless shirts, but more recently has worn crew shirts, and often also sports double-wide wristbands and a bandana. For shoes, he wears Nike Air Max Cages. Record against the Big Four Del Potro has a combined record against all members of the Big Four, which is one of the best in this category. He is also one of the few to have won at least three matches against each of the four. Roger Federer Del Potro has a record against Roger Federer, and a record in final. Besides the 2009 US Open title, del Potro also captured the 2012 and 2013 Swiss Indoors finals and the 2018 Indian Wells final, while Federer won the 2012 Rotterdam Open and the 2017 Basel Open. Federer won their a five-set meeting at the 2009 French Open semifinals, and the longest best-of-three-set match in history at the 2012 Olympic semifinal, 19–17 in the deciding set. Del Potro prevailed in the 2017 US Open quarterfinals against Federer in four sets. Novak Djokovic Del Potro has a record against Novak Djokovic. Djokovic won their first four meetings, before back to back victories for del Potro at the 2011 Davis Cup and their bronze medal match at the 2012 Summer Olympics in straight sets. However, in 2013, Djokovic won two of the most important matches between them to date; an epic five-setter at the 2013 Wimbledon Championships semifinals and a thrilling three-setter at the 2013 Shanghai Masters final. In the same year, del Potro defeated Djokovic en route to his second Masters 1000 final, at the 2013 Indian Wells Masters. Del Potro upset Djokovic in the first round at the 2016 Rio Olympics en route to the silver medal. Djokovic defeated Del Potro in three close sets in the final of the 2018 US Open, which was the first grand slam final for Del Potro since his victory at the 2009 US Open. Three of his four victories have come via national representation tournaments. Rafael