Jurgen Klopp and Pep Guardiola's rivalry has both dominated and changed English football.
The Liverpool manager and his Manchester City counterpart have fought out epic title battles - and their Premier League rivalry could be set for a fitting final chapter on Sunday.
That's when leaders Liverpool host Manchester City, with the victors set to be top with 10 games to go, while a draw could open the door for third-placed Arsenal instead.
But a lot of the headlines around the game will rightly focus on what could be the last act of a respectful contest for supremacy that started 11 years ago in Germany.