Davydenko upset

New Haven:

Juan Ignacio Chela of Argentina overcame a big deficit in the tiebreaker and upset top-seeded Nikolay Davydenko 6-1, 7-6 in the second round of the Pilot Pen. Dani-ela Hantuchova upset sixth-seeded Patty Schnyder 5-7, 6-2, 6-4 to enter the last eight, while second-seeded Amelie Mauresmo of France swept aside Elena Likhovtseva 6-1, 6-3. — AP