Tommy Haas and Alexandr Dolgopolov earned straight-set victories to advance to the second round of the Citi Open on Tuesday.
The fourth-seeded Haas of Germany defeated American qualifier Michael Russell 6-4, 6-2, and No. 2-seeded Dolgopolov of Ukraine beat Italy's Flavio Cipolla 6-1, 6-3.
On the women's side, top seed Anastasia Pavlyuchenkova of Russia won six of nine break point chances to eliminate Bojana Jovanovski of Serbia 6-4, 6-3.
Only a brief rain delay between sets slowed Haas, the last player to beat Roger Federer this year. Despite a spotty first serve, the 34-year-old never faced a break point, and he broke Russell's serve three times.
Dolgopolov needed less than an hour to dispatch Cipolla, breaking the Italian four times without dropping his serve. The 23-year-old had lost his previous two matches against Cipolla, but relied on a blistering forehand to maintain control - including a nice passing shot on match point.
Xavier Malisse, a Washington semifinalist in 201...