Vallily was part of the England team that competed at the 2010 Commonwealth Games in Delhi. Picked at the 91kg Heavyweight category, Vallily fought his way to the final, defeating Dominic Winrow of the Isle of Man in the first round, Arsene Foukou of Cameroon in the quarter-finals and gaining a walkover against Awusone Yekeni of Ghana in the semifinals. In the final he claimed the gold medal with a first round stoppage over Northern Ireland's Steven Ward after knocking him to the canvas, having quickly established a 6-1 lead. Speaking of Vallily's performance, coach Rob McCracken said "He's frighteningly good. We've got two years to work with him and there's a real possibility he could win the Olympics".