Swiss maestro Roger Federer defeated Kevin Anderson to set up a semi finals clash against Zverev in the ATP Finals. The second seed Federer outplayed his opponent in straight sets to win the match with 6-4, 6-3 scoreline. Anderson will now face Djokovic in other semi finals clash. However, Federer mentioned that as long as Djokovic is in competition it would not be easy for him to clinch his 100th ATP title. Nevertheless, Federer extracted a sweet revenge over Anderson, for the latter was the one to oust the former in the Wimbledon quarter finals this year.