Australian Open Day Four – Serena Williams was pumped up after beating former world No. 2 Vera Zvonareva in the second round. Williams saved three set points in the first.
Australian Open Day Four – The second set, though, was one-way traffic. Williams served well and eventually cruised 7-5 6-0.
Australian Open Day Four – Williams' older sister, Venus, also advanced. She crushed fellow American Lauren Davis. Can Williams end her five-year quarterfinal drought at majors?
Australian Open Day Four – Thursday's top matchup, on paper, pitted Victoria Azarenka, right, against Caroline Wozniacki. Azarenka was the winner, 6-4 6-2.
Australian Open Day Four – The pals shared a hug at the net when it was over. Azarenka could meet Serena Williams in the quarterfinals.
Australian Open Day Four – Staying hydrated was key on a day where temperatures hit almost 36 degrees Celsius. Novak Djokovic didn't linger on court, quickly disposing Andrey Kuznetsov.
Australian Open Day Four – Despite the hot temperatures, Djokovic stayed on court to sign autographs. He's bidding for a fifth Australian Open title.
Australian Open Day Four – Kei Nishikori said he felt dizzy because of the heat. But the U.S. Open finalist still defeated Ivan Dodig in four sets.
Australian Open Day Four – Feliciano Lopez admits he's lucky to still be in the tournament. The 12th seed -- for the second straight round -- saved a match point to advance. On Thursday, Lopez's opponent, Adrian Mannarino, retired in the fourth set.
Australian Open Day Four – There will be no fairy-tale ending for Aussie Lleyton Hewitt in Melbourne. The 33-year-old, seen here, lost in five sets to fellow 33-year-old Benjamin Becker.