Bopanna and Mergea did not lose serve even once as they won 6-2 6-7 (4) 6-1 against the unseeded New Zealand-American combination of Daniell and Baker.
The opening set was a stroll for the sixth seeds, who broke their rivals twice and held serve effortlessly to grab the initial edge.
However, Daniell and Baker clawed back in the second set by saving three break points and drastically improving their first serve.
But the fightback did not last in the third set as Bopanna and Mergea broke them twice and returned rather well to emerge triumphant.
Bopanna and Mergea will next face the winners of the match between third seeds Ivan Dodig and Marcelo Melo and Chris Guccione and Andre Sa.