Ukrainian Lesia Tsurenko beat Tunisian Ons Jabeur, the No 4 seed, 6-3, 6-2 to move into the last 16 of the Qatar Open at the Khalifa International Tennis and Squash Complex in Doha.
Tsurenko, ranked No 37, will play the winner of the match between Croat Petra Martic and Japanese Naomi Osaka next.
The 34-year-old Ukrainian beat wildcard Zeynep Sonmez (7-5, 6-3) in the previous round of the Qatar tournament.