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FILE - In this Dec. 12, 2017, photo, the entrance to the welcome center at the USTA National Campus is seen in Orlando, Fla. (AP Photo/John Raoux, file)

FILE - In this Dec. 12, 2017, photo, the entrance to the welcome center at the USTA National Campus is seen in Orlando, Fla. (AP Photo/John Raoux, file)

FILE - In this Dec. 12, 2017, photo, some of the 100 tennis courts that are available to players are seen at the USTA National Campus in Orlando, Fla. (AP Photo/John Raoux, file)

FILE - In this Dec. 12, 2017, photo, some of the 100 tennis courts that are available to players are seen at the USTA National Campus in Orlando, Fla. (AP Photo/John Raoux, file)