The young pretender gave Rafael Nadal one of the toughest tests on clay that the seven-time French Open champion has endured in recent years.
A full-blooded display against the undisputed king of the surface was eventually curtailed by defeat in three sets, but the fruits of his labor were bared for all to see.
"I had kind of rough matches in the past weeks so it gave me of course a lot of confidence, even though I lost them," Dimitrov said.
"I felt quite good about myself and the way I was progressing and of course, these hours in the gym.
"They're just a must. You just kind of do it and it doesn't matter if it's Sunday or Saturday, you've just got to do what you've got to do.
"I mean basically, you've got to make it."
Away from the court, and when he's not working out, Dimitrov has plenty of other interests to keep him busy.
While he remains coy on his private life, having been linked romantically to women's tennis stars Maria Sharapova and Serena Williams in the past, he is more than happy to divulge his other extracurricular activities.
"I enjoy good food," he said. "That's one of the things. I love good restaurants and I love cars and all these things.
"We're away for 25 weeks a year so you appreciate the time when you're off.
"If you can get it with friends and family and you know, people around that you thought you hadn't seen for a while, it's always good.
"Of course if you get the chance to go somewhere to get a few days away here and there, I mean I'd definitely get that."