<prompt> Kamilisha sentensi ifuatayo: Allen alifikia mwisho wake wa kwanza katika mashindano ya Uingereza ya 2011. Hadi sasa ameshinda mashindano matano ya kiwango cha juu 2012 World Open, 2013 World Open, 2016 Players Tour Championship Finals, 2018 International Championship, na  <response>: 2018 Scottish Open. Allen alishinda taji lake la kwanza la Triple Crown kwenye mashindano ya Masters ya 2018. 