In the 2007 Grand Prix, in a match with Ken Doherty, he was involved in an incident that led to his opponent branding him "a disgrace". Unhappy that the black would not go back on its spot after potting it, Allen struck the side cushion of the table with his fist. The referee told him that he would be warned if he did that again. Allen was not warned, and ended up winning the match. Doherty said, "He was a disgrace. For such a relative newcomer to the pro game, he's got a serious attitude problem". Allen later commented: "It was entirely my own fault and if there are going to be any repercussions then so be it." Allen did not reach the knockout stage of the tournament.