Lleyton Hewitt, who won Indian Wells Masters titles in 2002 and 2003, rallied to topple 2012 finalist John Isner Saturday in the second round.
The Australian veteran saved all four break points he faced en route to a 6-7 (6/8) 6-3, 6-4 victory in two hours and 23 minutes.
"It's nice to beat a big name," Hewitt said. "John's obviously a tough match for anyone to play, and especially coming off a good result here last year."
The 32-year-old Aussie will face Switzerland's Stanislas Wawrinka for a place in the round of 16.
Hewitt, now ranked 98th in the world, won the Kooyong Classic exhibition tournament in the build-up to the Australian Open in January, but he hadn't put together back-to-back wins on the ATP Tour this year.
He beat Czech Lukas Rosol in three sets in the first round, as Isner received a first-round bye.
The big-serving American peppered Hewitt with 18 aces, but was broken twice.
Isner fended off three match points in the final game before Hewitt closed it out with a forehand winner.
Hewitt said the victory was the kind of performance that gives him confidence he can still contend.
"It's good just to know you're thereabouts," Hewitt said. "Obviously for me the priority are the slams and Davis Cup. I try and pride myself on playing well in those matches and the rest of it I try and prepare as well as possible for those tournaments."