There is more than one way to win a convincing Miami Open singles title.
To borrow and tweak a formula from the American poet Robert Frost, it can be done with fire or with ice but either will suffice.
Consider Danielle Collins and Jannik Sinner, who each dropped just one set on their way to victory in south Florida this weekend.
Collins, the local girl made good, runs on fire. She is a fist-clenching street fighter — in the spirit of Connors or Sharapova — and pumps herself up by exhorting the crowd and her latest team members to give her more positive reinforcement, more volume, more whatever. Nicknamed Danimal, she stalks the court as much as she walks the court and blew a sassy post-victory kiss to a group of boisterous Romanian fans in Miami after polishing off their compatriot Sorana Cirstea in the round of 16.