Japan's 24th seed Kei Nishikoro also went through, and will play either Simon or Benneteau if he beats Australia's 94th-ranked Matthew Ebden.

CNN: Champion Djokovic backs calls for change in men's tennis

In the earlier mixed doubles final Sunday, wild-card entrants Jarmila Gajdosova and Matthew Ebden of Australia beat the Czech pair of Lucie Hradecka and Frantisek Cermak 6-3, 7-5.

NPR: Djokovic Beats Murray For 3rd Straight Aust. Title

World No.52 Klizan was reaching that stage of a grand slam for the first time and will face either 32nd seed Jeremy Chardy of France, who beat Murray in Cincinnati, or Australia's Matthew Ebden.

CNN: STORY HIGHLIGHTS