MIAMI (Ticker) -- Martina Hingis and Venus Williams will resume their rivalry after quarterfinal wins Tuesday and three American men advanced past the fourth round at the $6.12 million Ericsson Open.

Hingis, the top seed from Switzerland, defeated No. 10 Anke Huber of Germany, 7-5, 6-0 on Tuesday night to continue defense of her title. She improved to 12-1 lifetime against Huber, winning that last 11 matchups.

Williams extended her winning streak at this event to 16 matches with a 6-2, 6-3 quarterfinal victory over No. 21 Jelena Dokic of Yugoslavia that lasted just 55 minutes.

The third-seeded American has not lost here since 1997, when she was beaten by eventual winner Hingis in the third round. She claimed consecutive crowns here in 1998 and 1999 but missed last year's event due to tendinitis in both wrists.

"I think I played a lot better and a lot more controlled, especially compared to yesterday," Williams said. "I think I was able to serve a lot better, too. So, I was really happy."

Hingis is 10-7 all-time against Williams, handing her one of her most lopsided defeats, a 6-1, 6-1 spanking in the semifinals of the Australian Open in January.

"Well, it can't get worse for her," Hingis said. "In a way, she has nothing to lose. And she definitely wants to prove herself. We haven't played in the States since the U.S. Open. Australia is far away. They may be watching on TV but (the fans) can't really understand what would happen there -- 6-1, 6-1 in less than an hour. It's always hard to play her, you never know what's going to come out of it."

In men's fourth-round play, third seed and three-time winner Andre Agassi did not have to take the court to advance to the quarterfinals as No. 23 Tommy Haas of Germany withdrew with a sprained left foot.

Haas suffered the injury during his third-round win over Dominik Hrbaty of Slovakia on Monday.

"I don't really know what is the problem," he said. "All I know is that I have a lot of pain and I can barely walk straight."

Agassi, the reigning Australian Open champion, defeated Haas en route to his second title of the year two weeks ago at the Tennis Masters Series event in Indian Wells, California.

On Thursday, Agassi will encounter lucky loser Ivan Ljubicic of Croatia, a 6-3, 4-6, 6-4 winner over No. 22 Carlos Moya of Spain.

Young Americans Jan-Michael Gambill and Andy Roddick posted straight-sets victories.

Gambill, the 19th seed, routed Jonas Bjorkman of Sweden, 6-1, 6-2 in the first match of the day. A winner at Delray Beach, Florida two weeks ago, Gambill secured his seventh quarterfinal in eight events this season.

"I came out there and played as solid as a match as I possibly could," he said of his 65-minute win. "I didn't make a lot of errors and put a lot of pressure on Jonas out there. I returned all his serves, a lot of serves, and served fairly well."

Gambill's next foe will be No. 31 Gaston Gaudio of Argentina, who ousted No. 12 Juan Carlos Ferrero of Spain, 6-0, 3-6, 6-3.

This is Gaudio's best showing of the season on hard courts, having reached the final at Vina del Mar, Chile, the semifinals at Buenos Aires and quarterfinals at Acapulco on clay.

Competing in his home state, Roddick eliminated No. 21 Andrei Pavel of Romania, 7-6 (12-10), 6-2. He showed no letdown after recording the biggest victory of his young career over one of the greats in American tennis, defeating defending champion Pete Sampras in straight sets on Sunday.

"All of yesterday I couldn't get my mind off (that) match because it was such an emotional high for me," Roddick said. "Then I finally told myself I had to focus. At about 5:00 yesterday I didn't see another person the rest of the day. Every person I talked to wanted to talk about the last match."

The 18-year-old Roddick replaced Sampras as the youngest to reach the round of eight here. He also reached the quarters at Washington last year.

"I didn't know that," Roddick said. "It's kind of cool. There have been so many great players through here, so it's kind of surprising but nice.

"I knew that I could do something like this. I wasn't sure it was going to happen this tournament but I worked hard and I was fit and mentally ready coming into this tournament, so good things happen when you have good preparation."

Roddick will face seventh seed Lleyton Hewitt of Australia in Wednesday's quarterfinals.

"Lleyton is obviously (reaching) the semifinals every week. I look up to him because of what he's done at a young age," the American said. "I haven't done anything compared to him."

Hewitt, who reached the semifinals here last year, rallied past Fabrice Santoro of France, 3-6, 6-1, 6-2.

"It was a weird match," the Australian said. "I didn't really feel in it at the start and it was tough conditions, though. It was pretty swirly out there. But I felt like I got better and better. I had a strategy and I didn't really play to that in the

At 20 years old, Hewitt and Roddick will play the youngest quarterfinal held here.

"I've watched little bits of his matches," Hewitt said. "He's got a big game. He's definitely going to be a great player, there's no doubt about that."

In the evening session, No. 8 Patrick Rafter of Australia dispatched No. 10 Alex Corretja of Spain, 6-4, 6-3. The two played a tense three-setter last week at Indian Wells, with Rafter reaching the quarterfinals. He now leads the all-time series, 3-1.

Rafter will meet 24th-seeded Roger Federer of Switzerland in the quarterfinals on Thursday. Federer outlasted No. 25 Thomas Johansson of Sweden, 7-6 (7-3), 5-7, 7-6 (9-7) to advance to his fifth quarterfinal of the year.

The Swiss teen is having a breakout season, winning his first career title at Milan and reaching the final at Rotterdam and semifinals in Marseille. He also teamed with Hingis to lead their country to the Hopman Cup crown.

Hingis reached the semifinals last week at Indian Wells, ending a string of 10 consecutive finals appearances. She has won titles this season at Sydney, Qatar, and Dubai while reaching finals at the Australian Open and Tokyo.

A quarterfinalist here in 1995 and 1996, Huber advanced to the final at the Paris Indoors in February in her first tournament in five months due to a sprained right wrist. The next week, she reached the semifinals in Nice, France.

Huber started the match as if she planned on beating Hingis for the first time since Philadelphia in 1995, taking a 2-0 lead. Although Hingis leveled things at 2-2, Huber served at 5-4 -- holding a set point -- but could not close out the first set. She lost her serve as Hingis ran away with the match.

"The first set was a little close," Hingis said. "I didn't know exactly what to do against her. I haven't played her in a while. She started off firing and then I was up 3-2 and let it go. But then I played a little better. I was running back and fort

Williams reached the semifinals last week against her sister Serena at Indian Wells but withdrew due to right patellar tendinitis, a move that caused a flurry of controversy.

Playing in only her second tournament of the season, Dokic reached the quarterfinals here for the second straight year. She upset Venus Williams last year at the Italian Open to reach the quarterfinals.