From correspondents in Madrid, Spain, 07:03 PM IST

India's Sania Mirza and Chia-Jung Chuang of Chinese Taipei (Taiwan) upset second seed Spaniards Anabel Medina Garrigues and Virginia Ruano Pascual 7-6(4), 4-6, 10-7 to enter the doubles quarter-final of the Madrid Masters.

Sania and Chuang next play Victoria Azarenka of Belarus and Russia's Elena Vesnina who swept aside Russians Alla Kudryavtseva and Ekaterina Makarova 6-1, 6-1.

Sania, who failed to make it to the main draw of the singles after her 3-6, 3-6 loss to French Aravane Rezai in the first round qualifiers, is the sole Indian left in the tournament with the exit of Mahesh Bhupathi and his Bahamian partner Mark Knowles in the men's doubles second round wednesday.

Bhupathi-Knowles went down 4-6, 5-7 to Australian Stephen Huss and England's Ross Hutchins.

Meanwhile, the third seeds Leander Paes and Czech Lukas Dlouhy, who got a bye in the first round, pulled out due to Dlouhy's illness.

(Staff Writer, © IANS)