FLUSHING MEADOWS, N.Y. -- Taylor Townsend has surely watched Serena Williams dominate first-round opponents at Grand Slams over the years.
This time, the 18-year-old was on the business end of it at the U.S. Open.
Williams cruised to a 6-3, 6-1 victory in Tuesday's nightcap against the overmatched Townsend, a left-hander who was 2-years old when Williams made her U.S. Open debut in 1998.
The two-time reigning U.S. Open champ did not take it easy on the young American, winning 88 percent of her shots on her first serve and hitting 16 winners to Townsend's eight.
Still, Williams was impressed.
"She's incredibly talented," Williams said of Townsend following the match. "It's awesome for American tennis. We have such an amazing future."
Earlier, Wimbledon champion Petra Kvitova, rising Canadian star Eugenie Bouchard and former world No. 1 Ana Ivanovic were easy first-round victors.
The third-seeded Kvitova has now won her last eight Grand Slam matches after flattening the helpless Kristina Mladenovic 6-1, 6-0 in 54 minutes at Ashe Stadium.
Kvitova captured her second Wimbledon title in four years last month and is fresh off her hardcourt title in New Haven last week.
The seventh-seeded Bouchard improved to 17-3 at this year's Grand Slam events by blitzing Olga Govortsova 6-2, 6-1, while the eighth-seeded Ivanovic routed American Alison Riske 6-3, 6-0 at the USTA Billie Jean King National Tennis Center.
The 20-year-old Wimbledon runner-up Bouchard is the only woman to appear in at least the semifinals at this year's first three majors. Ivanovic is a former French Open champion.
A big upset came when 15-year-old American CiCi Bellis took out 12th-seeded Aussie Open runner-up Dominika Cibulkova 6-1, 4-6, 6-4 on Court 6. The San Francisco native and world No. 2 junior Bellis, making her Grand Slam debut, is ranked 1,208th in the world and is the youngest player to win a U.S. Open match since Anna Kournikova in 1996.
The reigning two-time U.S. Open runner-up and two-time Aussie Open champ Victoria Azarenka, a former world No. 1 seeded 16th at this fortnight, moved on by overcoming Misaki Doi 6-7 (3-7), 6-4, 6-1.
The on-the-mend Azarenka missed three months of action this year while being sidelined with a foot injury. Her second-round opponent will be American Christina McHale.
A pair of former U.S. Open champs had different results on Day 2, as Marina Erakovic took out 20th-seeded Svetlana Kuznetsova 3-6, 6-2, 7-6 (7-3) and 24th-seeded Samantha Stosur handled American Lauren Davis 6-1, 6-4. Kuznetsova titled here 10 years ago and was the Open runner-up in 2007, while Stosur captured her lone Grand Slam singles title in Flushing in 2011.
Meanwhile, 11th-seeded Flavia Pennetta held off Julia Goerges 6-3, 4-6, 6-1 and 17th-seeded Ekaterina Makarova erased American Grace Min 6-4, 6-2.
In other action involving seeds, No. 15 Carla Suarez Navarro ousted Ajla Tomljanovic, 3-6, 6-2, 6-1, No. 23 Anastasia Pavlyuchenkova crushed Teliana Pereira, 6-2, 6-0, No. 29 Casey Dellacqua erased Patricia Mayr-Achleitner 7-5, 6-3, No. 30 Barbora Zahlavova Strycova subdued Ashleigh Barty 6-1, 6-3, and Mona Barthel upended No. 32 Zhang Shuai 6-1, 6-2.
Also, No. 27 American Madison Keys cruised past Jarmila Gajdosova, 6-0, 6-3.
In other play featuring Americans, McHale snuck past Chanelle Scheepers 6-2, 1-6, 7-6 (7-5), Nicole Gibbs downed Caroline Garcia, 6-2, 2-6, 6-3, Varvara Lepchenko bested Alison Van Uytvanck 7-5, 6-2, Shelby Rogers beat Ukrainian Maryna Zanevska 6-4, 6-3 and Vania King outlasted former French Open champ Francesca Schiavone 6-3, 3-6, 6-3.