Australian Luke Tuckwell has produced the performance of his life to claim second overall at the Tour Auvergne-Rhône-Alpes and announce himself on the World Tour.Isaac del Toro of UAE Team Emirates-XRG claimed overall victory in the race formerly known as the Critérium du Dauphiné after riding away from the lead group with 8km remaining on the stage.But the 21-year-old from Orange in country New South Wales fought valiantly to remain within touching distance of some of the biggest names in the peloton and secure a first major World Tour podium of his career, ahead of Lidl-Trek's Juan Ayuso."As a neo-pro, man, I could never expect this," he told Cycling Pro Net after the race."I don't think I have [realised what I have achieved this week] actually I really wanted to do it for her today."Those last few kilometres I was really suffering but really thinking of her so yeah, this yellow jersey is in honour of her."With a brutal, 120-kilometre final passage from Beaufort to Plateau de Solaison-Brison on the cards on Sunday, Tuckwell was going always to have to dig deep to maintain his yellow leaders jersey.After UAE Team Emirates set a furious pace onto the final climb, Tuckwell appeared to be struggling to hang on with 10 kilometres remaining.Del Torro, seeing the Aussie at the back of the pack, attacked from the group of leaders and instantly established a gap, riding himself into the lead of the race.However, with van Gils in constant support, Tuckwell rode his own race and limited his losses, holding onto second overall despite Ayuso pushing up the road to finish second on the stage."I just really, from the bottom, knew what pace I had to ride," Tuckwell said."Man, Maxim saved me there