Novak Djokovic enlisted a former foe and longtime friend, Andy Murray, to become his new coach starting this year at the Australian Open. This news rocked the tennis world back in November, mostly because the two legends were often considered rivals on the court.

Novak Djokovic and Andy Murray have known each other for a quarter of a century. They played from the age of 12, meeting 36 times as professionals, including 10 Grand Slam matches. Yet they’ve never been able to talk shop and freely trade all sorts of thoughts — about tennis and otherwise — until now.