Boros knocked Saitama all the way to the moon with his meteoric burst, far further than Tatsumaki was able to. She, at one point, was consciously trying to output enough energy to send him to ...

The fight between Saitama and Boros was quite brief. Half of the fight was just Boros rambling about his power and how there wasn’t a single being that was able to last as long on the battlefield.