Andy Murray is set to retire this year, but Juan Martin del Potro wants the Brit to go out on his own terms.
World number five Juan Martin del Potro will not be ready to make his comeback in the first major of the year in Melbourne.
A smiling Juan Martin del Potro has offered a positive update on his recovery from a knee injury.
Juan Martin del Potro has failed to recover from a knee injury sufficiently to feature at the ATP Finals, with Kei Nishikori given his spot.
Juan Martin del Potro said his latest injury blow is a "hard blow that leaves me without strength".
Alexander Zverev is closing in on an ATP Finals spot after winning in Shanghai, while Roger Federer also reached the third round.
Juan Martin del Potro's opponent in the China Open final will be Nikoloz Basilashvili, who overcame Kyle Edmund 7-6 (8-6) 6-4 on Saturday.
Fabio Fognini's withdrawal from the China Open means Juan Martin del Potro is into his sixth final of 2018.
Fabio Fognini will provide Juan Martin del Potro's next test at the China Open, while Richard Gasquet upset Kevin Anderson in Tokyo.
Juan Martin del Potro will return to London for a first ATP Finals appearance in five years after reaching the last eight in Beijing.