Dragon Ball Super Episode 63 -

Goku keeps the immortal Zamasu occupied while Vegeta focuses on Black.

After training in the Hyperbolic Time Chamber—and destroying it in the process—Vegeta returns to the future significantly stronger. He dominates Goku Black in combat, explaining that a "fake" can never master the power of Saiyan cells like the true Prince of Saiyans. Dragon Ball Super Episode 63

Trunks briefly fights both villains alone before the reinforcements arrive. Essential Trivia Goku keeps the immortal Zamasu occupied while Vegeta

Before Goku and Vegeta arrive, Future Trunks and Mai attempt to take down the villains themselves. Mai tries to assassinate Black with a specialized bullet, and Trunks holds them off until help arrives, sustaining critical injuries. sustaining critical injuries.