Li Na sets up Radwanska clash
Li Na has set up a quarter-final clash with Agnieszka Radwanska in the Australian Open.
Li, a Melbourne finalist in 2011, overcame some nervy moments before seeing off Julia Goerges 7-6 (8/6) 6-1.
Goerges had a set point in the tie-break but missed a straightforward backhand and, from there, it was one-way traffic.
"When she missed I was laughing a bit because I was so happy to still be in the first set," the Chinese said.
"After that I think she had a bit of a mental breakdown."
Li will next meet Agnieszka Radwanska, who maintained her remarkable form in 2013 with a 6-2 6-4 win over Ana Ivanovic.
Fourth seed Radwanska has won all 13 matches she has played this year in straight sets, incorporating title wins in Auckland and Sydney.
"I'm happy I could play my best tennis again tonight," she said, "and I'm happy that I am in the quarter-finals again.
"She started playing more aggressively in the second set but at the important moments I was very focused and happy that I could close the match out in two sets."