Kammala jumla mai zuwa: Allen ya kai karshe na farko a gasar zakarun Ingila a shekarar 2011. Ya zuwa yanzu ya lashe gasar cin kofin duniya guda biyar <unk> 2012 World Open, 2013 World Open, 2016 Players Tour Championship Finals, 2018 International Championship, da
2018 Ƙasar Scotland ta buɗe. Allen ya lashe lambar farko ta Triple Crown a gasar zakarun Turai ta 2018.