MIAMI GARDENS, FLORIDA - MARCH 31: Grigor Dimitrov of Bulgaria addresses the fans after losing to Jannik Sinner of Italy during the Men's Final at Hard Rock Stadium on March 31, 2024 in Miami Gardens, Florida. Sinner defeated Dimitrov 6-3,6-1. (Photo by Elsa/Getty Images)
Toiling behind Dimitrov during his remarkable campaigns on the tour have been his two coaches, Daniel Vallverdu and Jamie Delgado
