<Table> <Tr> <Td> ← 2012 </Td> <Td> US Open </Td> <Td> 2014 → </Td> </Tr> </Table> <Tr> <Td> ← 2012 </Td> <Td> US Open </Td> <Td> 2014 → </Td> </Tr> <P> Serena Williams was the defending champion, and she successfully defended her title, defeating Victoria Azarenka in the final for second year in a row . By winning the tournament, Williams won her fifth US open crown and her seventeenth grand slam title . </P> <Table> <Tr> <Td> <Dl> <Dd> 01 . Serena Williams (Champion) </Dd> <Dd> 02 . Victoria Azarenka (Final) </Dd> <Dd> 03 . Agnieszka Radwańska (Fourth round) </Dd> <Dd> 04 . Sara Errani (Second round) </Dd> <Dd> 05 . Li Na (Semifinals) </Dd> <Dd> 06 . Caroline Wozniacki (Third round) </Dd> <Dd> 07 . Petra Kvitová (Third round) </Dd> <Dd> 08 . Angelique Kerber (Fourth round) </Dd> <Dd> 09 . Jelena Janković (Fourth round) </Dd> <Dd> 10 . Roberta Vinci (Quarterfinals) </Dd> <Dd> 11 . Samantha Stosur (First round) </Dd> <Dd> 12 . Kirsten Flipkens (First round) </Dd> <Dd> 13 . Ana Ivanovic (Fourth round) </Dd> <Dd> 14 . Maria Kirilenko (Third round) </Dd> <Dd> 15 . Sloane Stephens (Fourth round) </Dd> <Dd> 16 . Sabine Lisicki (Third round) </Dd> </Dl> </Td> <Td> <Dl> <Dd> 17 . Dominika Cibulková (First round) </Dd> <Dd> 18 . Carla Suárez Navarro (Quarterfinals) </Dd> <Dd> 19 . Sorana Cîrstea (Second round) </Dd> <Dd> 20 . Nadia Petrova (First round) </Dd> <Dd> 21 . Simona Halep (Fourth round) </Dd> <Dd> 22 . Elena Vesnina (Second round) </Dd> <Dd> 23 . Jamie Hampton (Third round) </Dd> <Dd> 24 . Ekaterina Makarova (Quarterfinals) </Dd> <Dd> 25 . Kaia Kanepi (Third round) </Dd> <Dd> 26 . Alizé Cornet (Third round) </Dd> <Dd> 27 . Svetlana Kuznetsova (Third round) </Dd> <Dd> 28 . Mona Barthel (Second round) </Dd> <Dd> 29 . Magdaléna Rybáriková (First round) </Dd> <Dd> 30 . Laura Robson (Third round) </Dd> <Dd> 31 . Klára Zakopalová (First round) </Dd> <Dd> 32 . Anastasia Pavlyuchenkova (Third round) </Dd> </Dl> </Td> </Tr> </Table>

Who won the us open tennis women's singles championship in 2013