Here's when the Knicks and Nets will begin preseason playNBA preseason begins Dec. 11, while the regular season starts Dec. 2211/27/2020, 9:36 PMCoby GreenFreelance Editorial ProducerJul 31, 2020; Lake Buena Vista, Florida, USA; San Antonio Spurs head coach Gregg Popovich stands as other players and staff on the Spurs and the Sacramento Kings kneel around a Black Lives Matters logo on the court before a NBA basketball game at the Visa Athletic Center in the ESPN Wide World of Sports Complex. / Kim Klement-USA TODAY Sports