It's fifteen years since the summer of 2004 and big upheaval at Liverpool and Chelsea.
Both clubs were looking for new managers and both were eyeing up the two most in-demand young coaches in Europe, Rafa Benitez and Jose Mourinho.
We're building up to Jurgen Klopp's pre-Chelsea press conference HERE
Unless you've been living under a rock since then, you'll know that the Reds got Rafa, Mourinho went to Stamford Bridge and a new 'rivalry' (of sorts, anyway) was born that has seen the sides face each another an astonishing 48 times since then.
It's a series of games that has had almost everything: semi-finals, cup finals, league 'deciders', Charity Shields, even eventful dead rubbers.. with plenty of moments of agony and ecstasy for both sides.
Ahead of another huge game at Anfield on Sunday afternoon, we've taken a look back at the games between the sides since the start of the 2004/05 season so try your hand at our quiz and tweet @LivEchoLFC your score! Can you get 100%? Good luck!
