Both Don Cheadle AND Jonah Hill showed up to watch Kevin Hart box a poker champ ... so says Antonio Esfandiari himself, who tells TMZ Sports his fight with the comedian was EPIC!!!
We spoke with 40-year-old Esfandiari just hours after Hart released footage of their scrap in Santa Monica earlier this month ... and the poker star told us A-list celebs showed out for their match.
"Jonah Hill was there. Dan Bilzerian was there. Don Cheadle was there.