In 2010 Asian Games, Tsang Kam To was the regular start-up player of Hong Kong team and he played all four games of the team. Although Hong Kong knocked out in the quarter-final, head coach Tsang Wai Chung paid tribute to Tsang Kam To for his bravery. In February 2011, Tsang Kam To was selected for the senior team by Tsang Wai Chung for a friendly against Malaysia in Kuala Lumpur. He earned his first senior cap but Hong Kong lost by two goals.