ROME: With a quarter-final victory against Bianca Andreescu at the Italian Open, world number one Iga Swiatek expanded her winning streak to 26 matches.
Swiatek, the defending Rome winner, defeated Andreescu 7-6 (7-2) 6-0.
After forcing a tie-break from a 5-3 deficit in the first set, she sailed through the second set.
The 20-year-old, who is seeking her sixth WTA championship in a row, will play Belarusian Aryna Sabalenka in the semi-finals on Saturday.
Tunisia's Ons Jabeur, meanwhile, upset Maria Sakkari 1-6 7-5 6-1 after being a game away from loss.
With his win in Madrid last week, Jabeur became the first Arab or African player to win a WTA 1000 title. He was 5-2 down in the second set against the Greek fourth seed.
With Sakkari serving for the match, Jabeur, 27, came back and won the next seven games to take a three-game lead in set three, which she would not relinquish.
Daria Kasatkina, who advanced when Switzerland's Jil Teichmann retired hurt with a 6-4 3-2 lead, will face Jabeur.