The second seeded Indo-Italian duo emerged 6-7(4) 7-6(8) 10-8 winners in the quarterfinal match that lasted two hour and two minutes.
They play third seeded pair of Jamie Murray of Scotland and John Peers of Australia in the semifinals.
Meanwhile, in the Malaysia Open in Kuala Lumpur, Somdev Devvarman and his South African partner Rik De Voest scored an upset win over second seeds Nenan Zimonjic of Serbia and Julien Benneteau of Switzerland in the quarterfinals.
