Rome - Holder Jelena Jankovic extended her Rome International win streak to 12 matches after ailing opponent Kateryna Bondarenko was unable to continue, handing a 6-1, 1-0 third-round victory Wednesday to the seeded Serb.

Polish 10th-seed Agnieszka Radwanska sprang a shock result, sending number five Ana Ivanovic to the scrapheap 6-1, 3-6, 6-4 after the Serb held a lead in the final set but was unable to seal the victory.

Jankovic, who lost her last match at the Foro Italico in 2006 in a quarter-final against Venus Williams, was disappointed to have such a short day and minimal workout on the clay.

"I would have loved to finish the match, because I was playing pretty well in that first set," said last season's year-end number one. "I felt the ball really well and I had good timing.

"It was a good set. But unfortunately my opponent was sick, and there's nothing you can do about that."

Jankovic is lifting on clay after claiming a title last month in Marbella as she heads towards Madrid next week followed by the French Open from May 24.

The day was in contrast to Tuesday, where rain for much of the afternoon resulted in players waiting around for hours before finally getting onto the court.

Jankovic had been stalled at 5-5 in her second set before moving through.

Following her minimal Thursday workout, the Serb hit the practise courts before a possible diversionary shopping expedition.

"I just try to play my tennis the best that I can, some days are hard; some days are easier. I cannot control the way the other girls play. I can control how I play."

The Serb needed less than half an hour to claim the first set and a few minutes more for the contest to come to its early end.

Jankovic will line up in the last eight of the event which ends Saturday as she faces Sunday's Stuttgart champion Svetlana Kuznetsova of Russia.

The seventh seed overcame Italian crowd-favourite Flavia Pennetta, the number 12, 6-3, 3-6, 6-0.

Sixth seed Victoria Azarenka, the Miami champion, defeated number nine Dane Caroline Wozniacki 6-2, 6-2. (dpa)