The men’s tennis organization ATP is still investigating Germany’s Olympic champion Alexander Zverev over allegations of physical violence made against him by an ex-girlfriend. “The investigation is still going on,” ATP boss Andrea Gaudenzi told the Spox internet portal on Wednesday. The ATP announced the investigation five months ago after Zverev’s ex-girlfriend, Olga Sharypova, alleged that during their relationship he was physically abusive towards her, including at the 2019 ATP tournament in Shanghai. Zverev, 24, has repeatedly denied wrong-doing and previously welcomed the investigation. …