How confident did Serena Williams feel about her game Saturday?

Confident enough to issue a “challenge” to her good friend, men’s tennis star Andy Roddick.

“I think it was just one of those days that I could have done anything against anybody,” Serena said after her 6-1, 6-1 whitewash of fifth-ranked Samantha Stosur. “Maybe I could have played Andy again today and beat him.

“So, danger. I’m definitely ready for him now. Today. Just today.”

Serena dissolved in laughter at the thought, but Serena/Roddick could make a formidable mixed doubles team at this summer’s London Olympics.

The pair entered the mixed doubles at the Australian Open in January before Roddick injured his hamstring. Asked in March about playing with Serena at the Olympics, Roddick showed that he knows who’s in charge.

“You have to ask the boss lady,” he said.

Earlier this week, Serena said Roddick was among her potential partners.

“Whoever can get me the best medal,” she said.

Peaking too soon?

Despite her great play Saturday, Serena did sound a little worried about peaking before the French Open later this summer.

“I struggled in the beginning of this year to get to this point,” said Serena, who won her only French title in 2002, but hasn’t made the semis at Roland Garros since 2003. “I want to keep it up. Obviously, this is just the beginning of the clay court season. I’m trying to play like this at the end of the clay court season. So, we’ll see.”

Positive spin

Samantha Stosur’s topspin failed miserably against Serena on Saturday, but she tried to spin her week at the Family Circle Cup in a positive direction.

“I’m very pleased with the week I’ve had,” she said. “My first three matches were very good, and I was very happy with the way I played against Venus (Williams).

“And to be honest with you, I don’t think I did that much wrong today (against Serena). I just got beat.”

Stosur, the 2010 Family Circle Cup champ, had to play the equivalent of two matches on Friday, finishing off her rain-delayed third-round match before going three sets to get past Venus.

“Still lots of positives to be taken out of the week,” she said.

TV time

Today’s finals are set for 1-3 p.m. on ESPN2, with Cliff Drysdale.

Attendance

8,714 people attended the semifinals day action and 4,254 attended at night on Saturday.