Jankovic and Ivanovic among early Zurich exits

Serbia's Jelena Jankovic and Ana Ivanovic joined the exodus of top players at this year's Zurich Open on Wednesday with surprise second-round defeats.

World number three Jankovic was beaten 6-4 6-4 by unseeded Czech Nicole Vaidisova while Ivanovic, the world number four, was downed 6-3 6-1 by fellow teenager Tatiana Golovin of France.

The two Serbs were playing their opening matches of the tournament after receiving byes into the second round. Earlier in the day, eighth seeded former world number one Amelie Mauresmo lost 6-2 4-6 1-6 to Ukraine's Alona Bondarenko .

Originally boasting a strong field of 14 top-20 players, including seven from the top 10, the Zurich Open has now lost half of its eight seeded players.

"I wasn't thinking about taking each match at a time but had started to think too much about doing well at the whole tournament," Ivanovic said after losing to Golovin for only the second time in eight meetings.

A resident of nearby Basel, Ivanovic had described the Zurich event as a home tournament but denied that had put any extra pressure on her.

"It was more because of how I now see myself as a top player," said the 19-year-old Serb who has shot up the sport's rankings following runs to this year's French Open final and the Wimbledon semi-finals.