Third-seeded Karolina Pliskova has overcome her emotions and an inspired opponent to advance to the US Open round of 16, downing Ons Jabeur 6-1 4-6 6-4.

Pliskova, a former world No.1 who reached the final at Flushing Meadows in 2016, won despite looking out of sync for much of Friday’s match.

After Jabeur took treatment on her right knee at the end of the first set and began winning in the second, Pliskova smashed her racket in frustration, earning a warning from the chair umpire.

But Pliskova relied on a strong serve game to get it back on track.

And Jabeur, a Tunisian who had been seeking to become the first Arab woman to reach the fourth round of a grand slam tournament, faltered down the stretch.

Though she cracked 49 winners, she also had 43 unforced errors, 17 of them in the final set.

Next up for Pliskova is the winner of the match later on Friday between No.16 Johanna Konta and No.33 Zhang Shuai.