Mubadala Citi DC Open: Frances Tiafoe advances in Washington

United States countrymen Frances Tiafoe and Brandon Nakashima showed off their tiebreaker prowess on Tuesday at the Mubadala Citi DC Open, winning their matches by taking back-to-back tiebreakers in Washington.

Tiafoe, the second seed, got past Russia's Aslan Karatsev 7-6 (5), 7-6 (5) in second-round action. Neither player broke serve in the match, with Tiafoe saving four break points and Karatsev saving two.

In the first-set tiebreaker, Tiafoe jumped out to a 4-1 lead before prevailing on his third set point. In the second-set tiebreaker, Karatsev led 5-3 before Tiafoe won the final four points.

Nakashima edged Australia's Aleksandar Vukic 7-6 (5), 7-6 (9) in a first-round match. Vukic had two set points in the second-set tiebreaker before Nakashima wrapped it up on his third match point.

Russia's Alexander Shevchenko knocked out eighth-seeded Sebastian Korda of the U.S. 5-7, 7-6 (4), 6-4 in a second-round match.

Other second-round winners were fifth-seeded Grigor Dimitrov of Bulgaria, Chinese qualifier Juncheng Shang, Finland's Emil Ruusuvuori and the United States' Michael Mmoh.Japanese lucky loser Sho Shimabukuro, U.S. qualifier Zachary Svajda and Australians Thanasi Kokkinakis and Jordan Thompson earned first-round victories.

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