Most local tennis aficionados are upset that the Miami Open will relocate from Key Biscayne to Hard Rock Stadium next year, but no group will be as affected as the people who take advantage of the four free public courts at Calusa Park. Their close proximity to the neighboring Crandon Park Tennis Center — where the Miami Open has been held for the past three decades — allowed tournament directors to use Calusa as additional practice courts for the players. For the duration of this partnership, Calusa Park's courts have been resurfaced to the level professional players expect, and amateur guests have been able to practice their backhand without worrying about cracked surfaces or broken nets. The isolated location keeps the courts generally vacant with the exception of weekday afternoons, when local tennis prodigies hit the courts. It's difficult to predict how the Miami Open's move will affect the quality of Calusa Park's courts, but for now, they're among the best-maintained in town.