Stan Wawrinka of Switzerland poses with the championship trophy after defeating Novak Djokovic of Serbia in their 2016 US Open Men's Singles final match at the USTA Billie Jean King National Tennis Center in New York on September 11, 2016. Stan Wawrinka became the oldest US Open men's champion in 46 years when he defeated world number one Novak Djokovic to claim a third Grand Slam title on Sunday. / AFP PHOTO / Jewel SAMAD