Li Na says that she had to focus for every shot against Agnieszka Radwanska at the Australian Open.
Li Na has described Agnieszka Radwanska as "a wall" following her victory over the Pole in the quarter-final of the Australian Open.
The Chinese reached her third Melbourne semi after winning 7-5 6-3 in one hour and 42 minutes on Rod Laver, but gave praise to her opponent following the match.
"She's a tough player," Li said.
"I was feeling today against a wall. She can hit everywhere, but without a mistake.
"You have to focus on every shot. Not every point, every shot."
The sixth seed will play the either Ekaterina Makarova or Maria Sharapova in the last four.
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