Andrew Dampf18:19, Jul 25 2021 Seth Wenig/AP Japanese superstar Naomi Osaka made short work of China’s Zheng Saisai, winning 6-1 6-4 to reach the second round. Naomi Osaka is back and still winning. The Japanese superstar who lit the Olympic cauldron defeated 52nd-ranked Zheng Saisai of China 6-1 6-4 on Sunday in her first match in nearly two months. The second-ranked Osaka was sharp from the start, serving an ace down the T on the opening point of the match and racing out to a 5-0 lead. Wearing a bright red dress and a red visor and with her hair styled in red-and-white braids to match the colors of the Japanese flag stitched onto the left side of her chest, Osaka served six aces in all and produced 25 winners to Zheng's 10.