Argentinian Francisco Cerundolo, the No 23 seed, moved into the last 16 of the Miami Masters by winning against American Tommy Paul, the No 12 seed, 6-2, 7-6 (4) at the Hard Rock Stadium on Sunday night.
Cerundolo, ranked No 24, will play Norwegian Casper Ruud, the No 5 seed, next.
The Argentinian beat Frenchman Alexandre Muller (6-1, 6-2) ahead of his victory.
In the previous round of the Miami Open, Paul, ranked No 13, edged out Kazakh Alexander Bublik (5-7, 7-5, 6-4).
Miami Masters 1000, other third-round results (Hard Rock Stadium, hard, USD 9.193.540, most recent results first):
- Alex De Minaur vs. Joao Fonseca
- Matteo Berrettini vs. Zizou Bergs
- Arthur Fils vs. Frances Tiafoe
- Taylor Fritz vs. Denis Shapovalov
- Roman Safiullin vs. Jakub Mensik
- Alexander Zverev vs. Jordan Thompson
- Adam Walton vs. Chak Lam Coleman Wong
- Reilly Opelka vs. Tomas Machac
- Casper Ruud beat Alejandro Tabilo (30): 6-4, 7-6 (4)
- Gael Monfils beat Jaume Munar: 7-5, 5-7, 7-6 (1)
- Brandon Nakashima (31) beat David Goffin: 6-3, 6-7 (5), 6-3
- Novak Djokovic (4) beat Camilo Ugo Carabelli (LL): 6-1, 7-6 (1)
- Sebastian Korda (24) beat Stefanos Tsitsipas (9): 7-6 (4), 6-3
- Lorenzo Musetti (15) beat Felix Auger-Aliassime (18): 4-6, 6-2, 6-3
- Grigor Dimitrov (14) beat Karen Khachanov (22): 6-7 (3), 6-4, 7-5
