He eliminated John Higgins and Joe Perry both 6–4 to play in the semi-finals of the Masters for the second time. Allen won the opening two frames against Shaun Murphy, but then lost six frames in a row. The rest of the season would prove to be disappointing for Allen as he couldn't advance beyond the last 16 of any event and after he lost the last five frames against Barry Hawkins in the second round of the World Championship to be beaten 13–11, he stated that the match had summed up his year as he was great in patches but overall came up short. He had not been coached by Terry Griffiths this season and Allen said that he was hopeful his form would improve next year by working with him again.