After using Kaioken x4 in the Galick Gun/Kamehameha beam struggle, Goku's body was so worn out that a pat on the back from Yajirobe caused him to yowl in pain. "It's like a massive upsurge of energy.

The differences between Goku and Vegeta's Super Saiyan Blue in the Dragon Ball franchise Goku and Vegeta using Super Saiyan Blue in the Broly movie (Image via Toei Animation).

Perhaps Goku felt that using Kaioken while in his Super Saiyan Blue form simply wouldn’t be able to overpower Broly fast enough for him to not overcome it.

This is the week that Dragon Ball Super fans have been waiting for, as one of the most highly-anticipated fights in the Tournament of Power finally takes place, as Goku fights Jiren from Universe ...