Iga Swiatek has continued her magisterial progress at the French Open after marching into the fourth round with a 6-4 6-4 victory over her Polish countrywoman Magda Linette.
But while the former world No.1's trek to the last-16 has proved trouble-free, without the loss of a set in her three matches, it suddenly becomes serious as she'll have to be at her Sunday best when she tackles in-form Marta Kostyuk.
The Ukrainian also eased towards the showdown on another suffocatingly hot morning at sun-bathed Roland Garros on Friday, making light work of Swiss Viktorija Golubic 6-4 6-3.
But the pair are expecting their clash to have a very different feel after a week of soaring temperatures. The heatwave is set to disappear on Sunday, replaced by vastly lower temperatures, with Swiatek admitting: "We will need to adjust on the day, which is not perfect but both players have the same. We'll do our best."
