I think the rule only prohibit coaches to gesture/talk/signal to players, not the other way round. So Nole can yell/talk as much as he likes to his box.
Novak Djokovic nº1!
The Golden Era of Novak: Australian Open * Dubai * Indian Wells * Miami * Belgrade * Madrid * Rome * Wimbledon * Montreal * US Open * Abu Dhabi * Australian Open * Miami * Toronto * China * Shanghai * World Tour Finals 2012 * Australian Open 2013 * Dubai * Montecarlo * Beijing * Shanghai * Paris * WTF * Indian Wells * Miami * Rome * WIMBLEDON 2014 * AUSSIE OPEN 2015
Federer to Nole: "Amazing year. Amazing tournament. Amazing match. You are THE BEST!"
ASI Director-General Gautam Sengupta said the list of India's treasures held abroad was "too long to handle" and there was a need for a "diplomatic and legal campaign" for their restitution from institutions, including the British Museum, the Royal Collection and the Birmingham Museum and Art Gallery.