Italian Lucrezia Stefanini advanced to the last eight of the Poland Open by winning against Jodie Burrage (6-4, 6-1),one of the surprises of the grass season, at the Legia Tennis Centre in Warsaw on Thursday.

Stefanini, ranked No 108, will play the winner of the match between German Laura Siegemund and Chinese Lin Zhu, the No 4 seed, next.

Ahead of her victory, the Italian defeated No 7 seed Linda Fruhvirtova (6-1, 7-6 (4)).

Burrage, ranked No 95, edged out Indian qualifier Ankita Raina (4-6, 6-4, 7-6 (4)) in the previous round.

Warsaw WTA 250, other last 16 results (Legia Tennis Centre, clay, USD 259.303, most recent results first):

• Iga Swiatek vs. Claire Liu
• Laura Siegemund vs. Lin Zhu
• Rebecca Sramkova vs. Karolina Muchova
• Viktoria Hruncakova vs. Linda Noskova
• Heather Watson beat Yuliya Hatouka (Q): 6-2, 5-7, 6-1

• Tatjana Maria beat Clara Tauson: 6-4, 6-0
• Yanina Wickmayer beat Tereza Martincova: 6-2, 6-2