After overpowering Tomas Berdych on Tuesday night, Novak Djokovic (above) will face Roger Federer in the semifinals. (Cameron Spencer/Getty Images)
Tuesday's weather: Cloudy, high of 77 degrees.
• Top-seeded Wozniacki hangs on. Caroline Wozniacki was down a set and a break against sixth-seeded Francesca Schiavone, but fought back to earn a 3-6, 6-3, 6-3 victory and ensure she'd keep the No. 1 ranking in next week's rankings.
• Federer, Djokovic to clash in semis. No. 2 Roger Federer coasted to a 6-1, 6-3, 6-3 victory over compatriot Stan Wawrinka, while No. 3 Novak Djokovic won 6-1, 7-6(5), 6-1 over sixth-seeded Tomas Berdych under the lights. Federer and Djokovic will meet Thursday for a place in the final -- a rematch of September's classic U.S. Open semifinal won by Djokovic in five sets.
• Li back in Aussie Open semis. Ninth-seeded Li Na advanced to the Australian Open semis for the second straight year with a 6-2, 6-4 victory over Andrea Petkovic.
Rafael Nadal with the baby penguins ... Petra Kvitova's revealing neckline forced Australian broadcaster Channel 7 to change their camera angles when she's serving ... The Roar on why men's tennis has never been better ... Petkovic says "sneaky" Li can go all the way ... Wawrinka's goregeous drop shot against Federer was a lone bright spot.
Photo of the Day
A group of raucous fans pull for Tomas Berdych on Tuesday against Novak Djokovic (from SI.com's Best Shots from Day 9 at the Australian Open).
4 ... Number of left-handed opponents Vera Zvonareva will have faced in five matches at this year's Open after Wednesday's match against Petra Kvitova. Zvonareva defeated southpaws Lucie Safarova and Iveta Benesova in the previous two rounds after beating lefty Sybille Bammer in her opener.
24-2 ... Record of Kim Clijsters at Grand Slam tournaments since returning from a 26-month retirement in August 2009.
10 ... Years since a WTA player aged 30 or over made her Top 5 debut. Francesca Schiavone, 30, will rise to a career-high No. 4 in next week's rankings.
Stan Wawrinka destroys his racket in frustration during Tuesday's quarterfinal against Roger Federer.
What's Happening Today
The quarterfinals wrap up Wednesday at Melbourne Park. ESPN2's live coverage begins a 7 p.m. and runs through 8 a.m. (Clip and save the complete TV schedule.)
All four singles matches -- two men's and two women's quarterfinals -- take place at Rod Laver Arena. The order of play is:
• No. 25 Petra Kvitova vs. No. 2 Vera Zvonareva (7 p.m., ESPN2)
• No. 12 Agnieszka Radwanska vs. No. 3 Kim Clijsters (not before 8:30 p.m. ET, ESPN2)
• BBQ expert Alexandr Dolgopolov vs. No. 5 Andy Murray (after second match, ESPN2)
• No. 1 Rafael Nadal vs. No. 7 David Ferrer (3:30 a.m. ET, ESPN2)
The complete order of play for Day 10 can be found here.
They Said It
"China bank, if you use the credit card, they will send text message, yeah, like wh'ere are you, when, and how much you're using also. If I use, he will for sure know. He will call, 'Where are you?' I can use credit card, but he still totally control."
--Li Na, on her husband's fiduciary oversight