Professional tennis is supposed to be a young person's sport.
But with leading contenders Roger Federer and Serena Williams well into their 30s, this U.S. Open could crown two of the oldest winners in the tournament's history.
Federer, a five-time winner who last hoisted the silver trophy in 2008, celebrated his 34th birthday on Aug 8. He entered this year's tournament seeded second after beating arch rival Novak Djokovic in a match in Cincinnati last month. That means Federer won't meet the top-seeded Djokovic unless and until they both make it to the final round.
If he gets past Djokovic, Federer would be the third-oldest winner of a tennis major, after Australian Ken Rosewell—who won the 1972 Australian Open at age 37 years two months—and Spaniard Andres Gimeno, who won the 1972 French Open at 34 years, 10 months.
But even a win by Federer this year would be eclipsed by a victory by Williams, who will celebrate her 34th birthday on Sept. 26, just two weeks after the women's final match. That would give her a calendar Grand Slam; notching each of the four majors in a single calendar year.