This Foundry Thracian is not the first gladiator I have ever painted as I did some back in the early seventies (Miniature Figurines, I think) and played the Pendragon Rules against some school friends.
He has two greaves (ocrea) over a cloth fascia, a metal arm defence (manica) and a typical curved sica. Less typically he is not wearing a helmet and has a small buckler (parmula) rather than the more usual small square shield (althought both were used). The Foundry figures are mostly depicted with sandals but gladiators are largely belived to have fought barefoot.
His usual opponent would be a murmillo, dressed in a stylised legionary fashion, just as he was supposed to represent one of Rome's barbarian enemies.