go the distance

Verb

 * 1)  To participate in a boxing match for its maximum number of rounds.
 * 2)  To have the endurance to see a difficult, sustained challenge to its natural end without faltering.
 * 1)  To have the endurance to see a difficult, sustained challenge to its natural end without faltering.
 * 1)  To have the endurance to see a difficult, sustained challenge to its natural end without faltering.