Chris Pratt's Hall of Fame MMA tour has hit Sao Paulo, Brazil -- where the Hollywood stud is takin' on (and takin' down) ANOTHER former UFC heavyweight champ!!
You might remember ... a few months back, the 'Guardians' star crashed Jay Glazer's MMA gym in L.A. to grapple up with Randy Couture ... and did pretty damn well since he used to be a legit amateur wrestler.
This time, Pratt took some time off his "Avengers: Infinity Wars" press tour to practice his double-legs on one of Brazil's most legendary fighters -- Antonio "Minotauro" Nogueira!