Australian Open champion Stan Wawrinka has qualified for the ATP World Tour Finals.

It means the 29-year-old will join the already-qualified trio of world No 1 Novak Djokovic, French Open champion Rafael Nadal and newly crowned Shanghai Masters winner Roger Federer in the London event next month.

Wawrinka qualified despite an early exit at the hands of beaten finalist Gilles Simon in Shanghai last week.

It is the second time the Swiss has reached the season-ending finale.

"It was my dream and goal to qualify again this year after the great experience in 2013," Wawrinka said. "The atmosphere in London is one of a kind and it means a lot to me to be there with the very best players of the world."

Japan's Kei Nishikori, US Open champion Marin Cilic, Czech Tomas Berdych and Milos Raonic of Canada currently occupy the remaining four qualification positions.

Agence France-Presse