New York: Poland`s third seed Agnieszka Radwanska has been bundled out of the US Open by Russia`s Ekaterina Makarova in the biggest shock of the women`s event at Flushing Meadows.
Makarova struck a barrage of groundstroke winners to topple Radwanska 6-4, 6-4 in the fourth round under floodlights on Louis Armstrong Stadium.
Radwanska started brightly, surging to a 4-0 lead, but Makarova peeled off eight straight games to take the first set and lead 2-0 in the second.
Radwanska fought her way back, holding four break points to level the second set at 4-4.
Makarova, the 24th seed, sealed the game with an ace before going on to close out the match in one hour and 32 minutes.
Her next opponent will be China`s Li Na after the fifth seed defeated Serbia`s Jelena Jankovic 6-3, 6-0 on Arthur Ashe Stadium`s centre court.
The 25-year-old Russian will play her first quarter-final at the US Open after twice reaching the last eight at the Australian Open.
"It feels amazing, I really love this tournament," she said.
Radwanska`s loss left her out of the quarter-finals at a major for the first time this year.