Zhang, Yafan make winning starts at French Open, Osaka waits for Swiatek
Zhang Zhizhen beats Australian Aleksandar Vukic 6-4, 4-6, 6-3, 7-5, while Wang Yafan downs Maria Timofeeva 6-3, 6-3. Naomi Osaka into second round and potential clash with Iga Świątek.