USC coach Lindsay Gottlieb spelled out her game plan, watched her players execute with ruthless precision and then celebrated her 300th career victory at Galen Center Tuesday, calling the chance to lead the dominant Trojans “the honor of my lifetime.

JuJu Watkins had 21 points, nine assists and six steals to help No. 3 Southern California trounce Cal State Northridge 124-39.

Juju Watkins and USC women’s basketball set multiple program records Tuesday night with a 124-39 victory over the Cal State Northridge Matadors, marking the largest margin of victory ever for USC basketball — men’s or women’s — and breaking the school’s single-game scoring record.

Watkins has 21 points, nine assists and six steals as six Trojans score in double figures to give Coach Lindsay Gottlieb her 300th career victory, 124-39. The Trojans convert 43 Matador turnovers

The USC Trojans women’s basketball team was not messing around Tuesday night, shattering the team record for most points scored in a single game. Led by standout JuJu Watkins (21 points, nine assists,