Olympic champion Alexander Zverev said his ankle injury was more serious than widely disclosed to the public. “It was always reported that three ligaments were ruptured. But it was actually seven, three of which were operated,” the German tennis player told an interview published by the Bild am Sonntag newspaper on Sunday. The ligaments healed after seven weeks, but he developed bone marrow oedema, Zverev said. “But that was not communicated to me, so I started rehab and training too early, which made the oedema worse,” the player explained. Zverev ruptured ankle ligaments in early June at the…