In the last couple of years, the Serbian tennis star created many viral moments with his former coach Goran Ivanisevic. During their six-year collaboration - especially in the latter years of their partnership - the record 24-time Major winner shouting at his coach in frustration was a common thing to see.

Novak Djokovic has revealed he will be playing in the Brisbane International, beginning Dec. 29 ... though newly-appointed coach and recently retired tennis star Andy Murray will not be in attendance.

Djokovic's new coach Andy Murray is not planning to join him for the Australian Open warm-up, Murray's team said.

"There’s an asset to their history as competitors. Any success of a relationship is based on complete buy-in."

Tennis legend Andre Agassi's resume is unassailable. Agassi won eight Grand Slam singles titles and was one of the biggest stars in the sport for decades. Additionally, Agassi's thoughts on Novak Djokovic can be trusted as he has a strong personal relationship with the 24-time Grand Slam champion.

Tennis legend Andre Agassi makes an interesting prediction about Novak Djokovic's career after Rafael Nadal's retirement.