Roger Federer recorded his 80th US Open win and 17th in 17th meetings with grizzled Russian Mikhail Youzhny to reach the last 32.
US Open: Roger Federer beats Mikhail Youzhny
Roger Federer recorded his 80th US Open win and 17th in 17th meetings with grizzled Russian Mikhail Youzhny on Thursday to reach the last 32, where he was joined by Andrey Rublev, the latest teenage upstart in New York.
Federer, 36, needed a second successive five-setter to reach the third round with a 6-1, 6-7 (3/7), 4-6, 6-4, 6-2 win over fellow veteran Youzhny, just one year his junior.
US Open: Federer outlasts Youzhny
Five-time champion and third seed Federer had also needed five sets to see off US teenager Frances Tiafoe in the first round.
The 36-year-old next faces another 35-year-old, Feliciano Lopez of Spain, for a place in the last 16. His record against Lopez is just as solid -- 12-0.
"It was quite a lot of fun out there -- I feel quite warmed up by now," said Australian Open and Wimbledon champion Federer, who fired 63 winners and 68 unforced errors.
Youzhny admitted he had cramped, which meant he could move left to right but not forward and back.
Federer on top
Federer celebrates after defeating Youzhny during the second round Men's Singles match on Day Four of the US Open at the USTA Billie Jean King National Tennis Center.
Gavrilova topples Radwanska
Unseeded Australian Daria Gavrilova toppled defending champion Agnieszka Radwanska 6-4, 6-4 on Friday to reach the final of the WTA hardcourt tournament at New Haven, Connecticut.
"I trusted my game plan and I think I executed it very well," Gavrilova, ranked 26th in the world, said after her win over the world number 10 and top seed. "I was pretty aggressive and taking chances whenever I could on her second serve."
US Open: Elena Vesnina vs Kirsten Flipkens
Elena Vesnina of Russia returns a shot against Kirsten Flipkens of Belgium during their second round Women's Singles match on Day Four of the 2017 US Open at the USTA Billie Jean King National Tennis Center.