The Indian Wells Masters saw Novak Djokovic lose to Luca Nardi.
The world no. 1 player Djokovic was upset by 123rd-ranked Nardi.
After withdrawing, the Italian was able to secure a spot in the main draw.
Nardi is the sixth player since 1990 to beat a world number one who is not in the Top 100.
Tommy Paul and Nardi square off in the quarterfinals.
Against Cameron Norrie, Gael Monfils pulled off a stunning comeback.
In round four, Monfils will square off against Casper Ruud.
The 2021 champion, Norrie, had trouble making mistakes.
In the competition, Holger Rune and Tommy Paul also made progress.