 Allen akasvika kekutanga mumakwikwi ekupedzisira mu2011 UK Championship. Kusvika parizvino akahwina makwikwi mashanu ekuronga 2012 World Open, 2013 World Open, 2016 Players Tour Championship Finals, 2018 International Championship, uye 2018 Scottish Open. Allen akahwina mukombe wake wekutanga weTriple Crown mumutambo weMasters wa2018. 