With world number one Simona Halep pulling out with an injury, defending champion Caroline Wozniacki leads the eight-woman field at WTA Finals in Singapore.
20-time Grand Slam champion Roger Federer says Nadal has always been respectful of him and that they didn't talk to each other much during the initial stages of their careers.
Federer acknowledges that returning to the clay-court swing of the tour would require considerable changes to his schedule and even add to his workload.
After outclassing Juan Martin del Potro in straight sets in the US Open final on Sunday, Novak Djokovic realises dream after emulating 'idol' Pete Sampras at US Open 2018.
Serena Williams lost her cool and the US Open final in straight sets as 20-year-old Naomi Osaka became the first-ever Japanese player to win a Grand Slam title on September 9.
Twelve months on and the duo will contest a high-stakes final where the prize on offer will not only be the $3.8 million winner's cheque that is up for grabs.
When Federer produced the shot of the tournament, Kyrgios stood with his mouth agape before congratulating his 37-year-old opponent. Watch the video of the shot here.