Simona Halep concedes Angelique Kerber will provide her toughest test yet when they meet in the semi-finals of the Australian Open.
The world number one recovered from a tough start to her last-eight match against Karolina Pliskova, at one stage trailing 3-0 before winning nine games in a row and eventually running out a 6-3 6-2 victor.
The 2016 champion Kerber made the most of Madison Keys' serving problems to claim a 6-1 6-2 win and continue her recent resurgence following a tough 2017.
Thursday's encounter will be Halep's maiden Melbourne semi-final appearance and she still has a point to prove, having never won a Grand Slam.
The Romanian top seed admits she will have to raise her game against the German, especially having struggled early on against Pliskova.
Halep said: "It wasn't my best start, but I knew I had to restart and move better, which I did in the end."
She added: "It will be a different challenge against Angelique Kerber. I have to be ready, be calm and try to dominate the match. I'm not thinking about the result. I just want to play my best."
The winner will go on to play either Caroline Wozniacki or Elise Mertens in Saturday's Australian Open final.