Top seed Jelena Jankovic suffered an upset in the opening round of the $220,000 Monterrey Open in Mexico, falling to world No.72 Anastasija Sevastova in their first encounter.
The ninth-ranked Jankovic saved set point down 5-4 to take the first set, but wasted a 3-1 lead in the second set and 4-2 in the third to eventually lose to Latvia’s only Top 500 player 5-7 6-4 6-4.
The 19-year-old Sevastova has now scored her first Top 10 victory. Before, she had faced two Top 10 players, Svetlana Kuznetsova at the 2009 US Open and Agnieszka Radwanska at Dubai this year, but lost to both.
Jankovic has played four events so far in 2010 and is yet to reach a quarterfinal. (source: Sony Ericsson WTA Tour, photo: Ralf Reinecke)