The Wimbledon champion is the front-runner for the top spot after eliminating Simona Halep from the chase with her third round win on Friday. She is nowhere near as famous as her compatriot in NY, seven-foot-three Knicks star forward Kristaps Porzingis.
Kvitova's only other trip to the quarterfinals at Flushing Meadows came in 2015, when she lost at that stage to eventual champion Flavia Pennetta.
Venus Williams, the most distinguished female player at the Open - twice and back-to-back a champ at Flushing Meadows, and a seven-time Grand Slam victor over a two-decade career - saw off Spain's Carla Suarez Navarro with a robust 6-3, 3-6, 6-1 win. She is a player without artifice or frills, but has a keen tennis brain.
Meanwhile, 28th seed Kevin Anderson overcame Paolo Lorenzi 6-4 6-3 6-7 (4) 6-4 to reach the quarter-finals.
'She definitely has the matches behind her back, she has got the variety, will make you hit a lot of balls'. She's now tallied 18 wins at the four Slams this season, compared to 14 wins across eight tour-level events in 2017.
The Latvian moved into the quarter-finals with a 5-7 6-4 6-2 win over the 30-year-old Russian star, whose five Grand Slam titles include the 2006 US Open. "I don't think I played as aggressive or was stepping in as much as I did in the first set". Her highest-ranked opponent was No.48 Oceane Dodin. If she hits you off the court, then you say, congratulations.
She took the first break with a backhand down the line but relinquished her advantage with a long forehand, however a sensational return clinched the opening set against Sevastova's serve. "She definitely has the matches behind her back".
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However, Sevastova, who reached the quarter-finals in NY previous year, started the second set hitting the ball with more aggression and used her slice to clever effect to manoeuvre the Russian around the court. "So I know that and so I'm going to try and take it." - veteran Venus Williams after reaching her 39th grand slam quarter-final with a 6-3 3-6 6-1 win over Carla Suarez Navarro.
This matchup pits one of the best servers in the tournament against one of the best returners.
"When Maria enters a tournament, the best news possible for her is if Serena is not in the draw", Mouratoglou told the New York Post.
Maria Sharapova insists she is proud of her run to the last-16 of the US Open and has enjoyed the "great ride". A wry lady, Sevastova once described herself a "D-list" celebrity in her home country, with occasional gusts to "C-minus". Sharapova issued a walkover because of a left arm injury before her next match.
Sharapova insisted Sunday that she had nothing to prove to her critics.
As excited as the tennis world is to see Nadal and Federer turn back the clock, two teenagers have yanked the men's game up to date. The French Open, the only major Sharapova has won a couple of times, took the same position and declined to invite her.
Sevastova advanced to the US Open quarterfinals for the second consecutive year. But her lack of match play over the past year and a half finally caught up with her.
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