Serena Williams didn't drop a game in advancing to the quarterfinals of the U.S. Open.
Roger Federer moved on with even less work when Mardy Fish pulled out of their fourth-round match Monday for precautionary reasons.
Williams beat 82nd-ranked Andrea Hlavackova 6-0, 6-0 in 57 minutes. It was the first time in 62 career victories at Flushing Meadows that the three-time U.S. Open champion enjoyed a "double bagel."
"She was fighting really hard," Williams said. "You give people any type of chance, especially in tennis, the match is never over until you shake hands. There is always a comeback available. So I didn't want to give her that opportunity — or anyone that opportunity — to try to come back, especially her in particular. She was getting so pumped up and she never gave up. I thought that was really incredibly positive."
Williams had 31 winners and just seven unforced errors. She and sister Venus play doubles during Monday's night session in Arthur Ashe Stadium.
Hlavackova, a 2011 French Open doubles champion, had never been past the second round in singles at a major tournament before this year.
Williams will next face Ana Ivanovic, who is finally back in a Grand Slam quarterfinal more than four years after her French Open title.
The 12th-seeded Serb beat Tsvetana Pironkova 6-0, 6-4. Ranked No. 1 in the world in 2008, Ivanovic has struggled with injuries and her confidence since.
Sara Errani, seeded 10th, beat sixth-seeded Angelique Kerber 7-6 (5), 6-3.
Federer, in his 34th consecutive quarterfinal at a major tournament, will meet sixth-seeded Tomas Berdych, who defeated 11th-seeded Nicolas Almagro 7-6 (4), 6-4, 6-1 in 2 hours.
"At least good that I didn't stay that long on court, that I was able to save some energy, as well," Berdych said.
- The U.S. Open is the most open of the Grand Slam tournaments each year. One good example is Olympic champion Andy Murray, one of the most popular players amongst fans. Photo: Getty Images
- John Isner had a peculiar reaction after he lost a point in the third set to Phillip Kohlschreiber. The American lost the match, which was played until 2 in the morning. Photo: Getty Images
- One of the most popular assistants was Barcelona's ex-manager, Pep Guardiola. Guardiola took advantage of a sabbatical to assist at the tournament. And Spanish tennis player María José Martínez took advantage by taking a photo of his encounter with the coach. Photo: Twitter @mariajo_martine
- As always, the grunts and celebrations of Maria Sharapova were the center of attention, like when she celelbrated her victory over countryman Nadia Petrova in the fourth round of the US Open. Photo: Getty Images
- And why the angry face? Sharapova didn't like the rain during her match with Petrova, so she wasn't very happy when she had to cover herself with a towel when the match was interrupted. Photo: Getty Images
- In the case of American Andy Roddick, the protagonists were his patrotic sneakers, with the stars and stripes stealing all the attention. Photo: Getty Images
- It appeared the match between Argentina's Leonardo Mayer and Juan Martin Del Potro wasn't very emotional, as these bored fans can attest, as they distracted themselves and slept through the match. Photo: Getty Images
- But it wasn't just the players who attracted attention at the tournament, as e-player and Tennis Hall-of-Famer Jennifer Capriati didn't lose a minute watching the action. Photo: Getty Images
- We all need a rest, including Serbia's Novak Djokovic, who took a break during his match against France's Julien Benneteau. Photo: Getty Images
- Like Murray, Serena Williams is very popular with the fans, who sought her autograph after her win over Russia's Ekaterina Makarova. Photo: Getty Images
- On the other side, sister Venus decided to become a fan and was watching Serena's match against Makarova. Photo: Getty Images
- But the fans of the U.S. Open didn't just deal with boredom or emotional matches, but also the heat of New York, like these fans in the match between Murray and Spain's Feliciano López. Photo: Getty Images
- At the end of each match, young fans wait for their favorites, like Sharapova, and ask for autographs. Photo: Getty Images
- Luxembourg's Mandy Minella got a lot of love during her match against Czech Republic's Kristyna Pliskova. Photo: Getty Images
- Although he wasn't the most popular American player, teenager Jack Sock also got support from fans of a particular style. Photo: AP