Agnieszka Radwanska opened the second round of women's singles with a routine victory Friday and Swiss stars Roger Federer and Stanislas Wawrinka filled their time off as the opening round of men's singles concluded by winning their doubles match.

Radwanska, the Polish player seeded No. 2 in the $10.5 million event at Indian Wells Tennis Garden, began the day on stadium court by beating qualifier Heather Watson of Britain 6-4, 6-3.

The only seeded player to lose early on was No. 29 Daniela Hantuchova of Slovakia. The two-time tournament champion bowed to American Varvara Lepchenko, 6-3, 6-2.

Federer and Wawrinka, the 2008 Olympic gold medalists, played in the new 8,000-seat Stadium 2, and emerged with a 6-2, 6-7 (4), (10-6) victory over Rohan Bopanna of India and Aisam-ul-Haq Qureshi of Pakistan.

"I don't know if it was sold out, but it felt like very, very full," said Federer, a four-time singles champion at Indian Wells. "You're not probably going to achieve that on center court (where capacity is 16,100) for a doubles. But that was a perfect setup, a feeling, and we can thank the tournament and (owner) Larry Ellison for building such a court so quickly.

"It's nice to see the game grow and seeing people coming out and enjoying it. It's great. I really had a great time out there with Stan today."

Wawrinka is the Australian Open champion.

"It took me time to realize really what I did in Australian Open," said Wawrinka, who is the No. 3 seed and could meet No. 7 Federer in the quarterfinals and top-seeded Rafael Nadal in the semifinals.

"Still when I'm saying that I won a Grand Slam it's still strange for me, but that's why it was good to be home during three weeks," Wawrinka said. "It was good to be with the family, to take more time for myself.

Wawrinka's second-round opponent will be Ivo Karlovic of Croatia, and Federer will open his title bid against French qualifier Paul-Henry Mathieu. Wawrinka and Federer both will play Saturday afternoon.

On Saturday night, Nadal will take on Radek Stepanek.