If you're not joking, then I would love to see your reasoning behind that statement. Saitama's strongest opponent so far in the anime, manga, or webcomic has been Burst Mode Boros, whose most powerful attack was self-described as a surface wiper. That feat puts Boros at less than Saiyan Saga Vegeta's level, who was confident in his ability to completely destroy Earth. And while Saitama was clearly not taking the fight seriously at all, it was pretty much the exact same scenario as Super Saiyan Goku vs Frieza, who's literally hundreds or thousands of times stronger than both Saiyan Saga Vegeta and Boros. Considering that Goku at the present time is literally tens or hundreds of thousands, if not millions, of times stronger than he was in his fight with Frieza, Saitama has literally no chance. People hyping up Saitama point to the fact that the force of his Death punch demolished the mountain behind Genos or that his Super Serious Series Punch vs Boros' final attack cleaved the atmospheric clouds, but they seem to ignore the fact that Goku was fighting Beerus with enough power to destroy the universe back in his Super Saiyan God form, and he now has access to the upgraded Super Saiyan God Blue (SSGSS) as well as the ability to stack Kaioken x10 on top of that. Summarily, Saitama would get absolutely fucked by Goku, Vegeta, Beerus, Whis, Champa, Vados, the Omni King, or hell even most of the Z fighters.