Germany’s Alexander Zverev failed to retain his Hamburg title and suffered a blow before the Paris Olympics after Frenchman Arthur Fils beat him 6-3, 3-6, 7-6 (7-1) in Sunday’s final. The top seed had looked doubtful for the clay tournament after injuring his knee on the Wimbledon grass but managed to get fit and shine during the week, only to come up short in the deciding tie-break. Fifth seed Fils, 20, took only his second career title after 3 hours and 33 minutes, sealing victory on his first matchpoint. The Paris Olympics starts on Friday, with the tennis tournament taking place on the Rol…