Tamara Zidansek on Sunday became the first woman from Slovenia to reach the quarter-finals of a Grand Slam when she defeated Romania's Sorana Cirstea at the French Open.
World number 85 Zidansek won 7-6 (7/4), 6-1 and will face in-form Paula Badosa of Spain for a place in the semi-finals.
The 23-year-old had never previously got beyond the second round of a Grand Slam.
However, she illustrated her potential by knocking out sixth-seeded former US Open winner Bianca Andreescu in the first round where she had twice been just two points from defeat.
"For me, the key was to start to really believe that I can beat the top players, to believe that I am better than them and that I belong there," said the Slovenian.
Meanwhile, Badosa reached her first Grand Slam quarter-final on Sunday by defeating Marketa Vondrousova of the Czech Republic in three sets 6-4, 3-6, 6-2.
The 23-year-old, a former junior champion at Roland Garros, is this season's best performing clay court player.
She now has 17 wins against just two losses on the surface, a run which includes the Belgrade clay court title on the eve of the French Open.
