Shock Indian Wells exit for Benoit Paire

Fritz, from California, was buoyed by the Indian Wells crowd to complete a 6-3 6-2 victory over the world number 40.

The 19-year-old American - who is ranked 136th in the world despite rising to 53rd as recently as August - will face sixth seed Marin Cilic in round two.

Qualifier Henri Laaksonen also made it through to the second round with a 3-6 6-4 6-2 victory over Croatia's Borna Coric.

Switzerland's Laaksonen, ranked 123 in the world, took two hours and 10 minutes to beat the world number 59 to set up a clash with Jack Sock in the second round.

Dan Evans made light work of his first-round clash against Dustin Brown to complete a 6-1 6-1 victory while fellow Briton Kyle Edmund set up a second-round meeting with Novak Djokovic after sealing a 6-1 6-3 win over Gastao Elias.

Tunisia's Malek Jaziri beat France's Nicolas Mahut 6-3 6-2 while Argentina's Guido Pella won a hard-fought clash against Spain's Guillermo Garcia-Lopez 4-6 7-5 6-2.

Mikhail Youzhny won the all-Russian contest against Daniil Medvedev 6-4 6-4 while Donald Young overcame fellow American Stefan Kozlov 7-5 7-6 (7/5).

There was also first-round wins for Jiri Vesely, Pierre-Hugues Herbert, Kevin Anderson, Stephane Robert, Jan-Lennard Struff, Federico Delbonis, Facundo Bagnis and Horacio Zeballos.