Agnieszka Radwanska became the second high-profile exit at the Porsche Tennis Grand Prix in Stuttgart in as many days after losing out to Sara Errani. Italian clay specialist Errani dumped out the Polish seventh-seed 7-6 (8/6) 6-4 in a tense match on Wednesday that lasted two hours and eight minutes. World No 9 Radwanska's early exit follows just a day after Ana Ivanovic lost to Caroline Garcia for the third time this year. World No 9 Agnieszka Radwanska is the latest top seed to bow out of the Porsche Grand Prix in Stuttgart . Sara Errani defeated Poland's Radwanska the 7-6 (8/6) 6-4 on Wednesday in two hours and eight minutes . Fifth seed Ivanovic, the 2014 runner-up, was beaten 7-6 (8/6) 6-4 by France's Garcia on Tuesday. Errani, the world No 15, will now take on Kazakhstan's Zarina Diyas after the 21-year-old rising star dismissed world No 19 Sabine Lisicki 6-0 6-0. Germany's Angelique Kerber breezed past American Alexa Glatch 6-2 7-5 to set up a second-round meeting with top seed Maria Sharapova. Radwanska follows Ana Ivanovic (right) out of the tournament after the fifth seed lost to Caroline Garcia . World No 15 Errani will now face Kazakhstan's Zarina Diyas, who defeated world No 19 Sabine Lisicki 6-0 6-0 .
Sara Errani beat seventh seed Agnieszka Radwanska 7-6 (8/6) 6-4.
Radwanska follows fifth seed Ana Ivanovic out of Stuttgart event.
Errani to meet Zarina Diyas who beat Sabine Lisicki 6-0 6-0.