“No Mas,” a documentary chronicling the two 1980 welterweight title fights between Roberto Duran and Sugar Ray Leonard, will premiere tonight at 5 (Pacific time) on ESPN.

Duran won their first bout via 15-round decision June 20, 1980 in Montreal. Five months later, on Nov. 25 in New Orelans, Leonard won via 8th-round TKO when Duran quit, saying “No mas.”

This documentary, by Emmy award-winning  director Eric Drath, will air as part of ESPN’s “30 for 30” series.