Federico Delbonis earned himself a clash against world No 1 Roger Federer with a first-round victory over Ryan Harrison at the BNP Paribas Open in Indian Wells.
The Argentinian took the first set 6-2 against his American opponent but surrendered the next 6-4 before prevailing 7-5 in the decider to advance to the second round.
The top seed awaits him with the two having met only once before, a victory for Delbonis on clay in Hamburg in 2013.
It was a good day for Argentina with Nicolas Kicker beating Czech Jiri Vesely 7-5 6-3 and Horacio Zeballos overcoming Japan's Yuichi Sugita 6-7 (5-7) 6-4 7-6 (7/4).
Spanish veteran Fernando Verdasco bucked the trend of Argentinian success as he survived a second-set wobble to defeat Guido Pella.
The 34-year-old looked to be cruising as he took the first set 6-2 but he lost the second 6-1 before bouncing back to take the third 6-2 and set up a meeting with third seed Grigor Dimitrov.
Jeremy Chardy won an all-French encounter against Julien Benneteau 6-4 7-6 (11-9) and he will next face last week's Brasil Open champion Fabio Fognini.
There were two all-American matches with Jared Donaldson beating Evan King 6-1 4-6 6-4 and Taylor Fritz defeating Reilly Opelka 4-6 7-6 (8-6) 6-4.
Canadian duo Denis Shapovalov and Peter Polansky advanced while there were also wins for Croatian Borna Coric, American Mitchell Krueger, Serbian Dusan Lajovic, German Maximilian Marterer, Greek Stefanos Tsitsipas and Russian pair Daniil Medvedev and Evgeny Donskoy.