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)

Serbia’s world No.9 Jelena Jankovic celebrated her 25th birthday on February 28th in Monterrey, Mexico.

Jankovic received a wildcard for the $220,000 Monterrey Open and is about to play her first-round match against Anastasija Sevastova, ranked 72th in the world.

The top-seeded Serb is the only Top 10 player in Mexico, as the others took some time to rest for the next week’s big event in Indian Wells. Second seed at the Monterrey Open is 24th-ranked Daniela Hantuchova of Slovakia, also a wildcard. (photos via Great Tennis Photos)

Second seed Marion Bartoli of France won her 300th career singles match and first title this year, beating China's Li Na 6-4 6-3 in the final of the Monterrey Open in Mexico.

Bartoli’s biggest competition on paper was top seed Agnieszka Radwanska, but she was upset in the first round by unseeded Li.

The Monterrey Open title is Bartoli’s fourth career singles title. The 24-year-old won Auckland, Tokyo and Quebec City in 2006. (source: Sony Ericsson WTA Tour)