Federer lost his opening match to Kei Nishikori and will be dumped out of the competition if he fails to beat Dominic Thiem.
In a tough week for the Swiss, fellow player Julien Benneteau also savagely accused the superstar of controlling the men’s game.
Speaking in an interview with French outlet RMC Sport, Benneteau, who played Federer eight times and won twice, explained the 37-year-old is obsessed with his sponsors.
“If he makes all that money off the court, it’s because outside the court he does an incredible job,” Benneteau said.
“In Basel, he spends an hour an a half on the court for his match.
“But after that, he spends 2-3 hours with the partners, with other people.
“In tennis, the [Pete] Sampras’ and [Andre] Agassi’s didn’t do all that.”
With his prowess seemingly waning on the court and criticism being directed at him off it, could Federer call it quits?
In a wide-ranging interview with the Sunday Times Magazine earlier this month, the experienced ace explained that he has concerns about how his body will continue to hold out if he keeps playing.
“What I like about my career is that no one knows what’s going to happen,” he said.
When asked if his new £230m sponsorship deal with Uniqlo means he’ll keep donning his tennis whites until the Tokyo Olympics in 2020, Federer replied: “Not necessarily.
“Two years isn’t a lot in most people’s lives, but for me, there’s a big difference between 37 and 39.
“It depends on how I’m playing, how my body feels.
“I know I’ll still be playing at club level with my kids, but beyond that, who knows?”
Coach Severin Luthi has predicted Federer will retire between 2019 and 2021 – meaning he will not play beyond 40 years old.
“I do not like to speak a lot about his retirement and he does not like to talk about it, because it’s like it approaches faster,” Luthi told Le Temps.
“I can see him playing for at least one to three years more.
“For the Davis Cup, it’s different.
“My contract ends at the end of 2018.
“I want to think about what I want for me.”
So, for now, it seems tennis fans will still enjoy a few more years of the 20-time Grand Slam champion entertaining across the world.