Monfils showed no sign of injury as he moved through to the fourth round at Melbourne Park thanks to Saturday's 7-6 (7-2) 6-4 6-3 victory over qualifier Ernests Gulbis.
Afterwards, Monfils was asked about his hand and fitness following a report citing video games, and the 33-year-old entertainer took aim at the media.
"You know, as I say, it's misunderstanding with people. I say this in a funny way, to be honest, but it's a disgrace, to be honest with you, because I'm fine," Monfils told reporters in a news conference.
"I'm in the second week, playing great tennis. I think it's just someone who, I don't know, try to — you know, I played ATP Cup, was fine. I practiced here for one month. I was really fine.
"I never said I was hurt. Somehow, you know, playing PlayStation, this? Come on. And it's easy, because I think I'm a good name to make up good story like that. Now you know."
Monfils will face fifth seed Dominic Thiem for a place in the Australian Open quarter-finals for the second time in his career.