Hong Kong boxer Raymond Poon Kai-ching marked his comeback by outclassing multiple national Muay Thai champion Dylan Yiu Tat-fai at the inaugural We Are Champs boxing celebrity crossover exhibition on Saturday.The 25-year-old Poon (7-2, 4 KOs) won via unanimous decision (59-54, 59-54, 59-54) at a full Star Hall in Kowloon Bay to claim his first win over Tiger Boy Yiu (professional Muay Thai record 23-5, 2 KOs) having lost