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TOPSHOT - Swiss Roger Federer serves a ball against German Peter Gojowczyk during the 1,500th match of his career at the opening day of the Swiss Indoors tennis tournament on October 21, 2019 in Basel. - Roger Federer check off another landmark on October 21, 2019 when he starts his bid for a 10th Basel title by playing the 1,500th match of his career. (Photo by FABRICE COFFRINI / AFP) (Photo by FABRICE COFFRINI/AFP via Getty Images)

TOPSHOT - Swiss Roger Federer serves a ball against German Peter Gojowczyk during the 1,500th match of his career at the opening day of the Swiss Indoors tennis tournament on October 21, 2019 in Basel. - Roger Federer check off another landmark on October 21, 2019 when he starts his bid for a 10th Basel title by playing the 1,500th match of his career. (Photo by FABRICE COFFRINI / AFP) (Photo by FABRICE COFFRINI/AFP via Getty Images)