Williams defeated US 15th seed Sloane Stephens 6-4, 6-1 to reach the US Open quarter-finals, winning eight of the last nine game in avenging a loss that ousted her from the 2013 Australian Open.
     
"It definitely felt like a bigger match because Sloane is such a great player, but I had to stay focused in the moment. I just tried the whole time to do what I wanted to, stay calm and stay relaxed," Williams said.
     
Williams booked a quarter-final against Spanish 18th seed Carla Suarez Navarro, who upset German eighth seed Angelique Kerber 4-6, 6-3, 7-6 (7/3).
     
Also booking a quarter-final matchup were Chinese fifth seed Li, who beat Serbian ninth seed Jelena Jankovic 6-3, 6-0, and Russian 24th seed Ekaterina Makarova, who upset Polish third seed Agnieszka Radwanska 6-4, 6-4.
     
Li, the 2011 French Open champion, matched her best US Open result by reaching the last eight.
     
"Maybe today was the best match of my whole life. Play aggressive. I wish I can play the same level like today," Li said,
     
Li improved to 5-4 against Jankovic, motivated by the sting of a loss in their most recent match in a round-of-16 affair last May in Rome.

(Agencies)

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