Grigor Dimitrov has faced the Big 3 at their best and names the one Big 3 champion who was toughest to beat at his peak.
Miami Open champion has one primary aim for clay-court season.
The Bulgarian doesn't want to burden Sinner with comparisons, but adds that at the moment, no one is better.
The American used wisdom, experience and a few good physios to power through the Miami draw.
"This is my last season, and these are some of my final events. I want to remember these moments," Danielle Collins said.
The pair have remained great friends over the years, says Dimitrov.
Grigor Dimitrov feels lucky to have played in the Big Four Era, and the Bulgarian says he wouldn't change a thing.
