Rafael Nadal and Novak Djokovic agreed their French Open quarter-final started too late after the four-hour match ended at 01:15 in Paris [00:15 BST].
Nadal won in four sets to beat his great rival in Tuesday’s night session.
Asked if it was too late to be playing, Nadal said: “It is without a doubt. I understand television pays a lot of money but we need to find a balance.”
Djokovic added: “Broadcasters say it’s going to be night match, day match. They give the money. They decide.”
Spanish fifth seed Nadal, going for a record-extending 14th men’s singles title at Roland Garros, won 6-2 4-6 6-2 7-6 (7-4) against Serbia’s Djokovic.
Despite the late finish to Nadal’s win over Djokovic and temperatures dropping to about 10C, few fans decided to leave Court Philippe-Chatrier and many of those who stayed were wrapped up in blankets.
The clay-court Grand Slam introduced night sessions for the 2021 tournament, although they were not fully open to fans because of coronavirus restrictions in France.
The night matches are shown on Amazon Prime in France and have started at 20:45 local time.
Nadal’s win over Djokovic was the second-latest finish in French Open history, falling 11 minutes short of the 2020 quarter-final between the Spaniard and Italy’s Jannik Sinner.
“There are difference of opinions about the night sessions,” said world number one Djokovic.
“I think they are starting too late. But again, TV decides. That’s the world we are living in.”