4x9 - Dragon Ball Z: Dragon Box

Stubbornly rejecting any help from Piccolo or Trunks, Vegeta challenges No. 18 to battle alone and wages an evenly-matched battle against her. Trunks is unable to hide his surprise at Vegeta's abilities, which are far greater than he imagined, to say nothing of No. 17. However, faced with the inexhaustible stamina possessed by No. 18, Vegeta's movements began to drop off more and more, until...!