https://youtu.be/2OIsGDyHdK0?t=15m33s

Just watch the next 10 seconds to 15 min44s, it pretty funny with the English voice actors.

Frieza being Frieza. Frieza never does the dirty work unless he knows he will win. After the Jiren and Goku rematch I bet Jiren will be weak enough for Freiza to demolish.