INDIAN WELLS, Calif. (AP) — Roger Federer beat Kevin Anderson 7-5, 6-1 Thursday night in the quarterfinals of the BNP Paribas Open, where the Swiss star has yet to drop a set in four matches.
Anderson failed to break Federer's serve in the match that lasted just over an hour. He had 21 unforced errors while Federer hit 17 winners and won 79 percent of his first serve points.
A four-time Indian Wells champion, Federer will play Alexandr Dolgopolov in the semifinals. Dolgopolov beat Milos Raonic 6-3, 6-4.
On the women's side, top-seeded Li Na beat Dominika Cibulkova 6-3, 4-6, 6-3 in a rematch of their Australian Open final and advanced to a semifinal against Flavia Pennetta, who defeated Sloane Stephens 6-4, 5-7, 6-4.
Federer cooled off Anderson, who ended Australian Open champion Stan Wawrinka's 13-match winning streak in the fourth round. Federer earned the only break in the first set in the last game, when Anderson netted a backhand volley.
"It was big to win the set and then to go on to break early in the second," Federer said. "Then double break was like a bonus. From then on I was home, basically. It was a really good match for me."
By then, Federer was on his way to winning 13 straight points. He broke Anderson twice in taking a 4-0 lead in the second set, having won seven consecutive games over both sets. Anderson did his best to trade groundstrokes with Federer while looking for an opening to rush the net, but the South African's repeated errors spoiled his game plan.
Dolgopolov's win assured the Ukrainian of rising to a projected No. 23 in next week's ATP Tour rankings. Already, he has made the biggest jump in the top 50, moving up 26 spots since the end of last year to No. 31 before the tournament began.
"Obviously if you're ranked 20, 30, 40 you're a good enough player. To get in the top 10 you just need all those small things to be together and to be solid," he said. "It's really small differences from the players that are top 10 and top 50. I don't think I changed a lot and it's working good; I'm staying healthy; I'm doing all the things I did but a little bit better."
Dolgopolov improved to 6-2 against top-20 opponents this year, including his third-round win over top-ranked Rafael Nadal.
Raonic took out fourth-ranked Andy Murray in three sets in the fourth round, but he couldn't follow it up win a win over Dolgopolov in their first meeting.
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