Faatumu le fuaiupu lenei: Na manumalo Diener i lana uluai siamupini faavaomalo i le 2010 European Junior Championships i le 50m backstroke. I le tausaga mulimuli ane, i le 2011, na ia puipuia ai lana pine auro ma manumalo ai foi i le 100m ma le 200m backstroke i le European Junior Championships i Belgrade (Serbia) ma manumalo ai i le pine auro i le World Junior Championships i Lima (Peru) i le 50m backstroke. O Christian Diener na manumalo i le siliva i le 50m backstroke i le European Short Course Swimming Championships 2013 ma
2014 i le European Aquatics Championships. Sa avea o ia ma sui o le au Siamani i le 2016 Summer Olympics i Rio de Janeiro ma sa tauva i le 200m backstroke, ma faaiuina 7th.