Mathias Gallo Cassarino also known as Mathias 7MuayThaigym, is an Italian Muay Thai fighter. He is a former WPMF World and WBC International 135 lbs Champion, a Max Muay Thai 62 kg Silver Tournament Champion and a Lumpinee Sadium title challenger.

Lumpinee Boxing Stadium is a sporting arena in Bangkok, Thailand. Opened more than a decade later than Rajadamnern Stadium, Lumpinee is run by the Royal Thai Army. It has become the symbol of modern Muay Thai. Only Rajadamnern Stadium rivals the prestige of holding the title of "Muay Thai Champion of Lumpinee". The ranking system and championship titles are held from mini flyweight (105 lb) up to super welterweight (154 lb).