WTA Player Stats - Jelena Ostapenko
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| Prudential Hong Kong Tennis Open | ||
| Surface: Hard | Date: Oct. 8 - Oct. 14 | Seed: 3 |
| Round | Opponent | W / L | Result |
| First Round | Kristina Kucova | Loss | 7-5, 3-6, 2-6 |
| China Open | ||
| Surface: Hard | Date: Sep. 29 - Oct. 7 | Seed: 12 |
| Round | Opponent | W / L | Result |
| First Round | Magdalena Rybarikova | Win | 6-4, 7-6 (7-3) |
| Second Round | Qiang Wang | Loss | 0-6, 0-6 |
| Dongfeng Motor Wuhan Open | ||
| Surface: Hard | Date: Sep. 23 - Sep. 29 | Seed: 10 |
| Round | Opponent | W / L | Result |
| First Round | Daria Gavrilova | Loss | 2-6, 4-6 |
| KEB Hana Bank Korea Open | ||
| Surface: Hard | Date: Sep. 17 - Sep. 23 | Seed: 1 |
| Round | Opponent | W / L | Result |
| First Round | Lara Arruabarrena | Win | 6-3, 6-3 |
| Second Round | Ekaterina Alexandrova | Loss | 3-6, 2-6 |
| US Open | ||
| Surface: Hard | Date: Aug. 27 - Sep. 9 | Seed: 10 |
| Round | Opponent | W / L | Result |
| First Round | Andrea Petkovic | Win | 6-4, 4-6, 7-5 |
| Second Round | Taylor Townsend | Win | 4-6, 6-3, 6-4 |
| Third Round | Maria Sharapova | Loss | 3-6, 2-6 |
| Western & Southern Womens Open | ||
| Surface: Hard | Date: Aug. 12 - Aug. 19 | Seed: 11 |
| Round | Opponent | W / L | Result |
| First Round | Alize Cornet | Loss | 6-1, 5-7, 0-6 |
| Coupe Rogers presentee par Banque Nationale | ||
| Surface: Hard | Date: Aug. 6 - Aug. 12 | Seed: 11 |
| Round | Opponent | W / L | Result |
| First Round | Johanna Konta | Loss | 7-6 (8-6), 1-6, 2-6 |
| Wimbledon | ||
| Surface: Grass | Date: Jul. 2 - Jul. 15 | Seed: 12 |
| Round | Opponent | W / L | Result |
| First Round | Katy Dunne | Win | 6-3, 7-6 (7-5) |
| Second Round | Kirsten Flipkens | Win | 6-1, 6-3 |
| Third Round | Vitalia Diatchenko | Win | 6-0, 6-4 |
| Fourth Round | Aliaksandra Sasnovich | Win | 7-6 (7-4), 6-0 |
| Quarterfinals | Dominika Cibulkova | Win | 7-5, 6-4 |
| Semifinals | Angelique Kerber | Loss | 3-6, 3-6 |
| Nature Valley International | ||
| Surface: Grass | Date: Jun. 24 - Jun. 30 | Seed: 5 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Kaia Kanepi | Win | 6-3, 7-5 |
| Third Round | Mihaela Buzarnescu | Win | 6-1, 6-2 |
| Quarterfinals | Agnieszka Radwanska | Loss | 2-6, 5-7 |
| Roland Garros | ||
| Surface: Red Clay | Date: May 27 - Jun. 10 | Seed: 5 |
| Round | Opponent | W / L | Result |
| First Round | Kateryna Kozlova | Loss | 5-7, 3-6 |
| Internazionali BNL d'Italia | ||
| Surface: Red Clay | Date: May 13 - May 20 | Seed: 5 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Shuai Zhang | Win | 6-2, 7-5 |
| Third Round | Johanna Konta | Win | 2-6, 6-3, 6-4 |
| Quarterfinals | Maria Sharapova | Loss | 7-6 (8-6), 4-6, 5-7 |
| Mutua Madrid Open | ||
| Surface: Red Clay | Date: May 5 - May 13 | Seed: 5 |
| Round | Opponent | W / L | Result |
| First Round | Irina-Camelia Begu | Loss | 3-6, 3-6 |
| Porsche Tennis Grand Prix | ||
| Surface: Clay | Date: Apr. 23 - Apr. 29 | Seed: 4 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Zarina Diyas | Win | 6-3, 6-0 |
| Quarterfinals | Karolina Pliskova | Loss | 7-5, 5-7, 4-6 |
| Miami Open presented by Itau | ||
| Surface: Hard | Date: Mar. 20 - Apr. 1 | Seed: 6 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Timea Babos | Win | 6-4, 6-4 |
| Third Round | Beatriz Haddad Maia | Win | 6-2, 7-6 (7-2) |
| Fourth Round | Petra Kvitova | Win | 7-6 (7-4), 6-3 |
| Quarterfinals | Elina Svitolina | Win | 7-6 (7-3), 7-6 (7-5) |
| Semifinals | Danielle Collins | Win | 7-6 (7-1), 6-3 |
| Final | Sloane Stephens | Loss | 6-7 (5-7), 1-6 |
| BNP Paribas Open | ||
| Surface: Hard | Date: Mar. 7 - Mar. 18 | Seed: 6 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Belinda Bencic | Win | 6-4, 3-6, 6-1 |
| Third Round | Petra Martic | Loss | 3-6, 3-6 |
| Dubai Duty Free Tennis Championships | ||
| Surface: Hard | Date: Feb. 19 - Feb. 24 | Seed: 4 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Elena Vesnina | Loss | 1-6, 6-7 (6-8) |
| Qatar Total Open | ||
| Surface: Hard | Date: Feb. 12 - Feb. 18 | Seed: 6 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Mihaela Buzarnescu | Loss | 1-6, 3-6 |
| St. Petersburg Ladies Trophy | ||
| Surface: Hard | Date: Jan. 29 - Feb. 4 | Seed: 2 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Vera Zvonareva | Win | 7-6 (8-6), 6-3 |
| Quarterfinals | Petra Kvitova | Loss | 0-6, 2-6 |
| Australian Open | ||
| Surface: Hard | Date: Jan. 15 - Jan. 28 | Seed: 7 |
| Round | Opponent | W / L | Result |
| First Round | Francesca Schiavone | Win | 6-1, 6-4 |
| Second Round | Ying-Ying Duan | Win | 6-3, 3-6, 6-4 |
| Third Round | Anett Kontaveit | Loss | 3-6, 6-1, 3-6 |
| Sydney International | ||
| Surface: Hard | Date: Jan. 7 - Jan. 13 | Seed: 3 |
| Round | Opponent | W / L | Result |
| First Round | Ekaterina Makarova | Loss | 6-7 (3-7), 1-6 |
| Shenzhen Gemdale Open | ||
| Surface: Hard | Date: Dec. 31 - Jan. 6 | Seed: 2 |
| Round | Opponent | W / L | Result |
| First Round | Kristyna Pliskova | Loss | 1-6, 4-6 |
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