Grisso showed that he is in excellent shape, despite the lack of official matches due to the coronavirus pandemic.
The challenge of the Bulgarian is to do as many repetitions as you can from an exercise, which is a combination of two different – push-ups, the popular so-called plank.
In 45 seconds, Grigor did 26 reps and threw the towel at his followers.
“Hello! I was hoping to be able to show you this T-shirt on the court in Paris, but we have to be patient. Instead, I challenge you to do more than 26 reps in 45 seconds,” Dimitrov wrote.