Agnieszka Radwanska refused to use a recent personal tragedy as an excuse for her shocking exit from the US Open on Sunday.

In another boilover of a women's draw already without Sara Errani, Petra Kvitova, Caroline Wozniacki and Sam Stosur, Poland's third seed was eliminated 6-4, 6-4 by Russia's Ekaterina Makarova under the floodlights at Louis Armstrong Stadium.

Radwanska was aiming to become the only woman to reach the quarterfinals at the four Grand Slam events this year. Despite a blazing start, in which she led 4-0, the 24-year-old was bundled out by her more powerful opponent in one hour and 32 minutes.