Matteo Berrettini, of Italy, sits on the bench after appearing lightheaded mid-game before being checked by team staff, in his first round match against Andy Murray, of Britain, at the Miami Open tennis tournament, Wednesday, March 20, 2024, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)
Andy Murray, of Britain, celebrates after beating Matteo Berrettini, of Italy, 4-6, 6-3, 6-4, in his first round match at the Miami Open tennis tournament, Wednesday, March 20, 2024, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)
Matteo Berrettini, of Italy, stumbles and appears lightheaded, before returning to his bench mid-game to be checked by team staff, in his first round match against Andy Murray, of Britain, at the Miami Open tennis tournament, Wednesday, March 20, 2024, in Miami Gardens, Fla. (AP Photo/Rebecca Blackwell)
Matteo Berrettini, of Italy, stumbles and appears lightheaded, before returning to his bench mid-game to be checked by team staff, in his first round match against Andy Murray, of Britain, at the Miami Open tennis tournament, Wednesday, March 20, 2024, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)
Andy Murray, of Britain, reacts after losing a point to Matteo Berrettini, of Italy, in his first round match at the Miami Open tennis tournament, Wednesday, March 20, 2024, in Miami Gardens, Fla. (AP Photo/Wilfredo Lee)