There are some implications for Li's former colleagues as a result.
Six-time Roger Federer offered his opinion on the one-sided nature of the matches at this year's World Tour Finals.
Not to be outdone by Hunter Reese, Mike Bryan Produces an around-the-netpost gem of his own in London.
Not the best at math? Don't worry tennis fans, we've got you covered with this handy sheet of Group B World Tour Finals semifinal qualification scenarios.
The Swiss maestro's net game is simly sublime on this point against hard-charging Kei Nishikori in London.
Marin Cilic's bad day on Monday had a lot to do with Novak Djokovic's good day.
The 14-time Grand Slam champion hopes to be back on the court in five weeks.
