He has won titles in two countries, taken his national team to the World Cup and even had a song written about him. Now, the question is being asked: is Ange Postecoglou ready for the game's biggest stage, the English Premier League?
If the former Socceroo coach needed proof that he has won over the notoriously hard-to-please Celtic FC supporters, it came during this week's match against Scottish premiership rivals Dundee.
As their team stormed to a 4-2 win which cemented second place on the ladder behind arch-rivals Rangers, the Celtic fans broke out into the latest club song.