WASHINGTON -- Top-seeded Lucie Safarova of the Czech Republic and two-time defending champion Magadalena Rybarikova of Slovakia were bundled out of the Citi Open in the first round on Tuesday.
Kristina Mladenovic of France, a semifinalist and quarterfinalist on tour in the last two weeks, came back for a 2-6, 6-3, 6-3 victory against the Wimbledon semifinalist.
No. 2-seeded Ekaterina Makarova of Russia cruised to a 6-1, 6-1 victory against Rybarikova, who had won her last 10 matches in the tournament.
On the men's side, 2004 champion Lleyton Hewitt defeated fellow Australian Marinko Matosevic 6-4, 6-3 to advance to the third round. Also through were seventh-seeded Kevin Anderson of South Africa and Denis Istomin of Uzbekistan.
Christina McHale upset fourth-seeded Sloane Stephens 6-4, 4-6, 6-0 in an all-American opening-round match on a side court that drew a standing-room-only crowd to go along with fans lined up outside a perimeter fence.
It was their first meeting on the tour, although there was a level of familiarity.
McHale will play another American, Vania King, in the second round.
"I don't think Sloane played her best in the third set so I just stayed focused," McHale said.
No. 5 seed Anastasia Pavlyuchenkova of Russia also advanced.