No. 1 seed Carlos Alcaraz of Spain was pushed to three sets before finishing off Dutch wild card Botic van de Zandschulp in the first round of the ABN AMRO Open.
Carlos Alcaraz got his grasscourt campaign up and running with a 6-4, 7-6(4) victory over Australian Adam Walton
Fonseca cruised through the first set before Fearnley found his groove in the second to level the match on a windy day in the California desert.
Novak Djokovic was shocked by Botic van de Zandschulp 6-2, 3-6, 6-1 in the second round of Indian Wells on Saturday as the Serbian suffered an early exit at the hands of a tournament lucky loser for a second consecutive year.
After shaking hands with the opponents, the 24-year-old Zverev, ranked third in singles, approached the umpire's chair and hit it repeatedly before heading towards his courtside seat, upset over a line call during the match earlier.
Thiem, Wawrinka stay positive after defeats on return
Three-times winner Serena Williams moved into the Toronto Open second round after beating Spain's Nuria Parrizas Diaz on Monday
A summary of Thursday's action at the US Open.
A summary of Saturday's action at the US Open.
Pole says she feels much better prepared to handle the pressure of her latest career milestone.
Daniil Medvedev lost his world number one ranking after being defeated by Gael Monfils
Images from Day 4 of the 2023 Australian Open, at Melbourne Park.
It was Novak Djokovic's first match this year after his Australian Open hopes were dashed when he was deported following an 11-day saga revolving around his decision not to have a COVID-19 vaccination.