<p>Second seed Sofia Kenin of the United States was sent crashing out of the US Open on Monday, beaten in straight sets by Elise Mertens of Belgium.</p>.<p>Kenin, the highest seeded player left in the tournament and winner of the 2020 Australian Open, was bundled out of the last 16 6-3, 6-3, in 1hr 14 mins by Mertens.</p>.<p>Mertens, the 16th seed, will now play Victoria Azarenka of Belarus in the quarter-finals.</p>.<p>Kenin, who had not lost a game in her first three rounds, never got her service game together against Mertens.</p>.<p>The 21-year-old Moscow-born player won only 56 percent of first serve points compared to 75 percent for Mertens.</p>.<p>Kenin also hit three double faults, while Mertens hit none.</p>.<p>Mertens, ranked 18th in the world, smashed eight aces, while Kenin failed to muster any.</p>.<p>Unseeded Azarenka came from a set down to oust 20th seed Karolina Muchova 5-7, 6-1, 6-4 in 2hr 30min.</p>
<p>Second seed Sofia Kenin of the United States was sent crashing out of the US Open on Monday, beaten in straight sets by Elise Mertens of Belgium.</p>.<p>Kenin, the highest seeded player left in the tournament and winner of the 2020 Australian Open, was bundled out of the last 16 6-3, 6-3, in 1hr 14 mins by Mertens.</p>.<p>Mertens, the 16th seed, will now play Victoria Azarenka of Belarus in the quarter-finals.</p>.<p>Kenin, who had not lost a game in her first three rounds, never got her service game together against Mertens.</p>.<p>The 21-year-old Moscow-born player won only 56 percent of first serve points compared to 75 percent for Mertens.</p>.<p>Kenin also hit three double faults, while Mertens hit none.</p>.<p>Mertens, ranked 18th in the world, smashed eight aces, while Kenin failed to muster any.</p>.<p>Unseeded Azarenka came from a set down to oust 20th seed Karolina Muchova 5-7, 6-1, 6-4 in 2hr 30min.</p>