Top seed Jelena Jankovic fell 5-7 6-3 6-3 to world No.17 Flavia Pennetta in the second round of the Tennis.com Zurich Open and lost her first in 13 matches.
Pennetta has never before beaten Jankovic, and they had played five times before this Zurich meeting. Additionally, the 26-year-old Italian today defeated a number one player in the world for the first time.
The Serb has never made it past the second round at the Zurich Open in four tournament appearances.
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