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.
The Bulgarian has stacked quality wins, and is reaping the rewards.
Danielle Collins, dog by her side and retirement calling, is still taking strides in her career.
The Spaniard shows his class -- and sense of humor -- after a tough loss.
"It's unbelievable. It's like a statistic like Djokovic started in his best years," Alexander Zverev said of Jannik Sinner.
The former champion makes her return to a star-studded field in Charleston.
