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Washington - France's Jo-Wilfried Tsonga defeated his first top-10 rival in nearly two years, ousting Russian second seed Karen Khachanov 6-4, 2-6, 7-5 on Tuesday at the ATP Washington Open.
The 34-year-old Frenchman, ranked 70th in the world, outlasted eighth-ranked Khachanov after one hour and 58 minutes, turning back the clock to reach the third round of the US Open hardcourt tune-up event.
"I played very good tennis," Tsonga said.
"Everything went OK. Just very happy to go through. It's good to see some results for all the hard work."
Tsonga, who lost his only Grand Slam final to Novak Djokovic at the 2008 Australian Open, had dropped six matches in a row against top-10 rivals since beating fifth-ranked German Alexander Zverev in October 2017 in a Vienna quarter-final.
There's a revitalised spark in Tsonga, who won his 17th ATP title in February it Montpellier as a 210th-rated wildcard. He fired 13 aces and won 80 percent of his first-serve points.
"When you play so long, sometimes you don't feel like yourself," Tsonga said.
"Sometimes you lose your personality. I try to keep it and bring it back on court. When you are like this, it's a lot better."
Tsonga advanced to a third-round match against British 13th seed Kyle Edmund, who defeated South Africa's Lloyd Harris 6-1, 6-4.
Russian third seed Daniil Medvedev reached the third round by ousting US wildcard Bjorn Fratangelo 6-3, 6-4.
The world number 10 might face an injured rival in the third round as 40th-ranked hometown favourite Frances Tiafoe beat Kazakhstan's Alexander Bublik 6-1, 7-6 (7/5) then quickly departed with a foot injury.
"I'm very happy to return home with a win," 16th seed Tiafoe said in a statement.
"Unfortunately at the end of my match I felt a tweak in my foot. In the interest of making sure I can play my next match to the fullest, I will be getting my foot checked out."
Australia's Bernard Tomic wasn't so lucky, withdrawing from his first-round match with a finger injury. German lucky loser Peter Gojowczyk replaced him and outlasted Russian Andrey Rublev 7-6 (8/6), 4-6, 7-6 (7/2).
Khachanov, who earlier this month became the first Russian in the top 10 since Mikhail Youzhny in 2011, is coached by Vedran Martic but has worked the past couple weeks with former world number three Nikolay Davydenko.
"We started to train in Moscow, so that's the preparation I've had with him, for 10-11 days, and then I asked him to come here as well," Khachanov said.
"We just started with him. I don't want to make any official announcement yet. But he started to help me two weeks ago. Hopefully he can join the team."
Together with Medvedev, Khachanov has signalled a new rise in Russian tennis.
"It's great for the country and great for us to be higher, slowly reaching new goals," Khachanov said.
"Hopefully we're moving up slowly a long ways."
Results from Tuesday's matches at the ATP and WTA Washington Open (x denotes seeding):
Men
Second round
Kyle Edmund (GBR x13) bt Lloyd Harris (RSA) 6-1, 6-4
Frances Tiafoe (USA x16) bt Alexander Bublik (KAZ) 6-1, 7-6 (7/5)
Daniil Medvedev (RUS x3) bt Bjorn Fratangelo (USA) 6-3, 6-4
Jo-Wilfried Tsonga (FRA) bt Karen Khachanov (RUS x2) 6-4, 2-6, 7-5
Marin Cilic (CRO x6) bt Marius Copil (ROM) 7-6 (7/4), 7-6 (7/4)
First round
Yoshihito Nishioka (JPN) bt Daniel Evans (GBR) 6-4, 6-1
Miomir Kecmanovic (SRB) bt Alexei Popyrin (AUS) 7-6 (8/6), 6-3
Reilly Opelka (USA) bt Chris Eubanks (USA) 6-4, 7-6 (7/3)
Jordan Thompson (AUS) bt Jack Sock (USA) 7-5, 6-3
Peter Gojowczyk (GER) bt Andrey Rublev (RUS) 7-6 (8/6), 4-6, 7-6 (7/2)
Nick Kyrgios (AUS) bt Thai-Son Kwiatkowski (USA) 7-5, 6-4
Women
First round
Monica Puig (PUR x8) bt Allie Kiick (USA) 6-4, 6-2
Rebecca Peterson (SWE) bt Sloane Stephens (USA x1) 6-2, 7-5
Kristina Mladenovic (FRA) bt Shelby Rogers (USA) 6-4, 6-4
Zarina Diyas (KAZ) bt Coco Gauff (USA) 6-4, 6-2
Camila Giorgi (ITA) bt Sachia Vickery (USA) 6-2, 7-5
Hailey Baptiste (USA) bt Madison Keys (USA x2) 7-6 (7/4), 6-2
Catherine McNally (USA) bt Zhu Lin (CHN) 6-4, 6-2
Hsieh Su-Wei (TPE x4) bt Kirsten Flipkens (BEL) 6-4, 6-3
