Leander Paes and Mahesh Bhupathi beat Marc Lopez and David Marrero in straight sets, 7-6 (5), 6-4 to move into the quarterfinals of the Sony Ericsson Open late on Tuesday night.
In other matches, Roger Federer fought through a tough first set and turned it on in the second to beat Juan Monaco 7-6 (7-4), 6-4 as the Swiss clocked his 20th win of the season.
"It was tough not having played him very often," said the Swiss. "This is as slow as it gets out on the hard court. It's a bit of clay almost except that you can't slide. I thought he played well in the later stages of the first set and then also in the second. I had a return game which worked well, and was able to serve it out."
Federer will next play Olivier Rochus.