KEY BISCAYNE, Fla. -- Martina Hingis demolished American qualifier Janet Lee 6-1, 6-0 to become the first player to advance through to the third round of the Nasdaq-100 Open on Friday.

Coming off a loss to 18-year-old Slovakian Daniela Hantuchova in Indian Wells on Sunday, Hingis was back at her ruthless best, needing just 50 minutes on a muggy center court to seal victory.

After allowing Lee, who has won just one match in six Tour events this season, to hold her opening serve the third-seeded Swiss took control of the match, racing through the next 11 games.

"After Indian Wells with the travel and everything it was difficult to come here and be ready," said Hingis, who had an opening-round bye and spent the first few days of the week at her Florida home near Tampa. "I'm really pleased with the way I played today.

"If you can play like this your first match I think that gives you an edge."

No. 8-seeded Serena Williams also won her opening match, but not without drawing jeers from the crowd. With American Lilia Osterloh serving two points from winning the first set at 5-4, 30-30, a light rain prompted Williams to ask chair umpire Anne Lasserre-Ullrich about halting play.

Osterloh wanted to continue, but Lasserre-Ullrich stopped the match for five minutes. Fans booed, and when play resumed and Williams won the next two points to even the set, they booed again.

"It was a little slick. Especially on the lines it was slick," Williams said. "I just looked and asked the umpire what she thought."

Gamesmanship by Williams? Osterloh didn't think so.

"It was the umpire's call," she said.

Williams won 7-5, 6-1.

Information from Reuters and the Associated Press was used in this report.