Outlander provided 17-year-old jockey Jack Kennedy with the biggest winner of his career in a thrilling Lexus Chase at Leopardstown.Approaching the final fence, three Gigginstown House Stud-owned runners were in a line, with Bryan Cooper's chosen mount Valseur Lido ahead of Outlander and Don Poli.However, Valseur Lido's stamina gave way and while Ruby Walsh conjured a late run out of Djakadam, it was only good enough for third place as last year's winner Don Poli stuck on for second to give trainer Gordon Elliott a one-two in the Grade One.