Complex sentence: Bencic's grass court season began at the Topshelf Open in the Netherlands where she defeated Jessica Pegula and Alison Van Uytvanck both in straight sets to advance to the quarterfinals.
Split into simpler sentences: Bencic's grass court season began at the Topshelf Open in the Netherlands. Bencic defeated Jessica Pegula and Alison Van Uytvanck both in straight sets to advance to the quarterfinals.