Agnieszka Radwanska takes on Na Li on Tuesday in the quarter-finals of the 2013 Australian Open (00:00 GMT start).
Radwanska remains unbeaten in 2013, and she’s still yet to lose a set having seen off Ana Ivanovic 6-2 6-4 in the fourth round of this year's Australian Open.
The Pole is a serious challenger to win the Melbourne slam this weekend.
"I think I played very well. I'm especially happy I kept the same level from the beginning to the end," Aga said after beating Ivanovic.
"That's why I was able to close this match out in straight sets."
She added: "I'm just very happy I've been able to play at this very high level. 13 matches [and] not even losing a set - I hope I can keep going for three more."
Radwanska's opponent, former Aussie Open finalist Li, got through a tough first set on Sunday before clinching a 7-6 6-1 win over Germany’s Julia Goerges in round four.
Li leads 5-4 on the head-to-head, but Radwanska won the most recent meeting between the pairing in Sydney earlier this month.
Prediction: Radwanska in two.