WASHINGTON — Defending US Open champion Emma Radukanou advanced to the season’s second quarterfinal on Thursday, beating Camila Osorio 7-6(5), 7-6(4) at the Citi Open in nearly three hours on a hot and humid day.
With a temperature of 90 degrees Fahrenheit (30 degrees Celsius), runner-up Radukanu took a medical time-out late in the second set to treat the coach for blisters on her right hand with a racket.
Earlier, a coach came to Osorio.
Radukan’s only other quarter-final out of a dozen tournaments in 2022 came in April at red clay in Stuttgart, Germany, where she lost at that stage to top-ranked Iga Swiatek. This time, Răducanu will face 60th-placed Lyudmila Samsonova for reaching the semi-finals of the hard-surface tournament at the US Open starting on August 29.
Samsonova returned to beat Ayla Tomljanovic 4-6, 6-3, 6-2 on Thursday.
Radukan, the British player who won the Flushing Meadows title in qualifying a year ago at the age of 18, continued to favor Osorio, the 20-year-old from Colombia.
Radukanu was leading 3-0 early in the match, then needed to play a tie-break to get the first set out. She served for the match at 5-4 in the second, but there she broke thanks to three double faults and a right hand into the net.
However, Radukan was better in the tie-break again, closing the win when Osorio sent a field return wide. Radukan, who lost in the second round at every major tournament this year, dropped her racquet and covered her eyes with both hands.
After the players met for a hug at the net, Radukan seemed too exhausted to wave to the crowd to his fullest on what Yoshihito Nishioka called a “crazy hot day” after he beat No. 7’s Karen Khachanov 7-6 ( 2). 7-6(1).
Now Nishioka faces Dan Evans in the quarterfinals. Evans moved forward when third-ranked Taylor Fritz stopped playing in the third set due to feeling unwell.
In other results, lucky loser Van Siyu eliminated Donna Vekic 4-6, 7-5, 6-1 in the women’s draw, while Mikael Ymer defeated Emil Ruusuvuori 6-3, 6-7 (3), 6-4 in the men’s draw. .