The unseeded Indo-Romanian won the quarter-final 6-4, 3-6, 10-7.
This is Bopanna's best show at the ATP Masters this season. He reached quarter-finals at the Canada and Monte Carlo events with Aisam-ul-haq Qureshi.
The will now fight it out with the mighty Bryan brothers -- Mike and Bob -- for a place in the final.
Image: Rohan Bopanna