There are a number of gluten-free options at the tournament.
In Stadium Concessions:
Ming Bings are Gluten Free and Vegan
Beyond Burgers (Vegan Burger)
Grab n Go items throughout the Miami Open:
Grilled Veggie Ciabatta
Caesar Salad
Smoothies at Sweet Spot
Veggie Burgers at Cheeseburger Baby and Monster Burger
Vegan Nuggets at Fuku