<p>Two-time Grand Slam singles winner Garbine Muguruza advanced to the second round of the US Open on Tuesday, the Spanish 10th seed easing past Japan's Nao Hibino in straight sets.</p>.<p>Muguruza, the 2016 French Open champion and 2017 Wimbledon winner, needed 1hr 30min to complete a 6-4, 6-4 victory over Hibino, the world number 78.</p>.<p>Muguruza will face Bulgaria's Tsvetana Pironkova in the next round. Pironkova advanced with a 6-2, 6-3 win over Russia's Liudmila Samsonova.</p>.<p>In other early women's matches, 16th seed Elise Mertens of Belgium cruised into the second round with a 6-2, 6-2 win over Germany's Laura Siegemund.</p>.<p>US hope Amanda Anisimova, seeded 22, also made sure of her place in the second round with a hard-fought win over Bulgaria's Viktoriya Tomova.</p>.<p>Anisimova prevailed 7-5, 7-5 in 1hr 27 minutes and now faces either Natalia Vikhlyantseva of Russia or compatriot Katrina Scott.</p>
<p>Two-time Grand Slam singles winner Garbine Muguruza advanced to the second round of the US Open on Tuesday, the Spanish 10th seed easing past Japan's Nao Hibino in straight sets.</p>.<p>Muguruza, the 2016 French Open champion and 2017 Wimbledon winner, needed 1hr 30min to complete a 6-4, 6-4 victory over Hibino, the world number 78.</p>.<p>Muguruza will face Bulgaria's Tsvetana Pironkova in the next round. Pironkova advanced with a 6-2, 6-3 win over Russia's Liudmila Samsonova.</p>.<p>In other early women's matches, 16th seed Elise Mertens of Belgium cruised into the second round with a 6-2, 6-2 win over Germany's Laura Siegemund.</p>.<p>US hope Amanda Anisimova, seeded 22, also made sure of her place in the second round with a hard-fought win over Bulgaria's Viktoriya Tomova.</p>.<p>Anisimova prevailed 7-5, 7-5 in 1hr 27 minutes and now faces either Natalia Vikhlyantseva of Russia or compatriot Katrina Scott.</p>