TennisDjokovic reveals that he is in WhatsApp group with Federer, NadalPenbugsFebruary 25, 2020February 25, 2020 by PenbugsFebruary 25, 2020February 25, 20200 Despite being fierce competitors on the field, Djokovic, Federer and Nadal share huge respect for each other on and off the court. In an interview...