However, India's singles challenge ended at the Vietnam Open following defeat of Yuki Bhambri.
In Vienna, the unseeded Indo-Uruguayan pair shrugged off the close first set loss to emerge 6-7(3) 6-4 10-8 winners over Melo and Kubot, ranked Nos 3 and 4 respectively in the ATP doubles list.
They will now fight it out with Karen Khachanov and Lucas Pouille for a place in the final of the hard court event.
The 37-year-old India also has three runners-up finishes this season (Canada, Eastbourne, Dubai) with three different partners.
Meanwhile, at the USD 50,000 Vietnam Open in Ho Chi Minh City, fourth seed Yuki lost 6-3 3-6 6-7(2) to eighth seed Australian John Millman to bow out of the tournament.
In the decisive third set, Yuki was down 2-4 after dropping serve in the sixth game but broke immediately.
Eventually, it boiled down to the tie-breaker in which Yuki trailed 2-4 and could not never recover.
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