1 Novak Djokovic, Roger Federer and the rest of the ATP Finals field taking the annual year-end selfie.2 Serena Williams and husband Alexis Ohanian at an Adweek party.3 Aryna Sabalenka went out in a...dress? Coat? Whatever it is, she rocks it.4 Benoit Paire, with his new rock-n'-roll purple hair, took some shots in a church.5 Frances Tiafoe, Taylor Fritz and Alex de Minaur went all out in Milan at the NextGen Finals.6 The U.S. and Czech Fed Cup teams wore all red for the Fed Cup Final celebration.This Week on Tennis Channel: Fed Cup Final (Sat. 11/10 to Sun. 11/11) Petra Kvitova leads the Czech Republic against defending champions USA. Live coverage begins Saturday at 8:00 am EST.