Spurs' Keldon Johnson remains working on his game at all hours of the day

LAKE BUENA VISTA, FLORIDA - AUGUST 03: Keldon Johnson #3 of the San Antonio Spurs dunks the ball against the Philadelphia 76ers during the third quarter at Visa Athletic Center at ESPN Wide World Of Sports Complex on August 03, 2020 in Lake Buena Vista, Florida. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Mike Ehrmann/Getty Images)