The Cristina Bucsa earned the biggest win of her career Monday, upsetting fourth-seeded Alize Cornet of France 1-6, 6-4, 6-1 in the opening round of the Open 6eme Sens Metropole in Lyon, France.
Bucsa, a 24-year-old who is positioned 139th on the planet, had never recently crushed a player evaluated in the best 50. She won in spite of enrolling no experts and six twofold blames.
Sixth-seeded Ana Konjuh of Croatia also dropped her first-round match after winning the first set, falling 5-7, 6-0, 6-3 to British qualifier Katie Boulter.
Fifth-seeded Jasmine Paolini of Italy beat Romania's Irina Maria Bara 4-6, 7-5, 6-3, and Russia's Varvara Gracheva, Hungary's Anna Bondar and Switzerland's Stefanie Voegele also advanced.
Fourth-seeded Sara Sorribes Tormo of Spain needed more than three hours to complete a 7-5, 6-7 (2), 6-1 win over Russia's Kamilla Rakhimova in the first round at Monterrey, Mexico.
Sorribes Tormo finished with a 71 percent to 58 percent edge in first-serve rate.
Fifth-seeded Camila Osorio of Colombia got past Poland's Magdalena Frech 6-3, 7-6 (6), needing four match points to wrap up the second-set tiebreaker.