Kristina Kucova had not won a WTA main draw match in over a year but she came from a set down to beat Jelena Ostapenko.

Ostapenko suffers stunning first-round exit to Kucova in Hong Kong

Jelena Ostapenko crashed out of the Hong Kong Tennis Open in the first round as world number 317 Kristina Kucova claimed one of her biggest ever victories.

The Slovakian had not beaten a player ranked in the top 20 in over two years, and had gone over a year without a WTA main draw win, but rallied from a set down to defeat 2017 French Open champion Ostapenko 5-7 6-3 6-2.

Ostapenko has been struggling with a left wrist injury in recent tournaments but took the opener only to lose the final two sets as Kucova set up a meeting with lucky loser Viktoriya Tomova.

Eighth seed Alize Cornet had no issues, though, dropping just three games in her win over Israel's Julia Glushko, with Saisai Zheng, Luksika Kumkhum and Dayana Yastremska also winning.

Karolina Pliskova required six match points before she finally got the job done against Varvara Lepchenko in the first round of the Tianjin Open.

The top seed, who has taken a wildcard to compete in the tournament in order to boost her chances of making the WTA Finals, finally advanced courtesy of a 6-2 6-7 (3-7) 6-3 success that took two hours and 30 minutes.

Alison Riske, who won the tournament in 2014, was beaten 5-7 6-1 7-5 by Veronika Kudermetova but fifth seed Hsieh Su-wei beat Ajla Tomljanovic in two tight sets.

Jaziri wins again in Dubai

Jaziri shines on despite floodlight failure in Dubai

Following his upset win against Grigor Dimitrov, Malek Jaziri marched on at the Dubai Tennis Championships on Wednesday.

Stephens survives in Acapulco

Stephens survives in Acapulco, Tsurenko eases through to quarters

US Open champion Sloane Stephens advanced in Acapulco thanks to Wednesday's 5-7 7-6 (8-6) 6-0 victory over Dutch qualifier Arantxa Rus.

Del Potro outlasts Ferrer

Del Potro outlasts Ferrer as Zverev and Thiem advance

Juan Martin del Potro made it through to the last eight by outlasting Spanish veteran David Ferrer 6-4 4-6 6-3 in Acapulco on Wednesday.

Wawrinka ends hard-court season

Wawrinka to miss Indian Wells and Miami Open

Stan Wawrinka feels he would be better off on the practice courts rather than playing at Indian Wells or in Miami.

Del Potro, Zverev win in Acapulco

Del Potro, Zverev into Acapulco semis

Juan Martin del Potro and Alexander Zverev will meet at the Mexican Open after quarter-final wins.