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Top picks Cooper Flagg and Dylan Harper face off in Las Vegas on ESPN with multiple streaming services available.

The Dallas Mavericks fell to 1-1 in Las Vegas Summer League, losing to the San Antonio Spurs, 76-69. David Garcia-Jones led the Spurs in scoring with 21 while number two overall draft pick Dylan Harper scored 16 with six rebounds, a pair of assists, two steals, and a block. Cooper Flagg scored 31 points and grabbed four rebounds in defeat.

The team's offseason moves, including adding big men Luke Kornet and Kelly Olynyk, have bolstered the rookie's optimism.

WHAT: The first game of Las Vegas Summer League for the Dallas Mavericks The injury report isn’t a thing again but Dylan Harper is on a minutes restriction. Cooper Flagg did play a lot on Friday, 31+ minutes,

In going against Cooper Flagg and the Mavericks in NBA Summer League, Spurs rookie Dylan Harper says it could be a preview of what's to come.

The St. Anthony product became an unrestricted free agent this offseason after another injury-plagued season with San Antonio.