Liverpool and Manchester United meet on Saturday in what could be a crucial match-up for both teams.
Liverpool have been going through a barren run of form in recent months, in a spell where they have only won once in seven outings.
As a result, they are currently languishing in seventh in the Premier League, and will be looking for a result against their bitter rivals to kick-start their season.
In contrast, Manchester United have been flying high, after winning six of their opening seven Premier League matches.
However, many have questioned the calibre of teams they have played, with many pointing to the Liverpool game as their first real test this season.
Therefore, both teams have a lot riding on Saturday's contest.
Both sides have two of the most talented managers in world football at the helm: Jose Mourinho has been a success for over a decade and Jurgen Klopp enjoyed a highly successful spell at Dortmund.
When asked which of the two he would rather play under, Liverpool legend Robbie Fowler was quick to recognise the talents that both managers had at their disposal.
However, Fowler eventually went with Klopp due to a number of crucial factors.
Fowler said: "If Jose Mourinho was Liverpool manager, of course I would have played for him.
"I do like the way he looks after the players. He backs them up. He's been an unbelievably successful manager.
"But I think Jurgen Klopp is an exceptional manager. He's got everything you'd want as a player to play under.
"His man-management skills are exceptional. He's tactically very good, technically very good, and I'm a massive believer in the man-management side of football clubs, because I think he'll bring the best out of players.
"(Klopp's) attacking style would have more of a sway. Certainly in terms of formations, the tactics that Jose uses at times — the one up front — would not be ideal for me.
"The fluency that Liverpool play at times would probably be perfect for me. Managers getting the best out of me, it would probably be Jurgen."
Even though it could be argued Fowler is biased towards Liverpool, his reasoning makes perfect sense.
Overall, 'God' scored 183 goals in a red shirt, making him the sixth highest scorer in Liverpool's history.
But if he had indeed played under Klopp, with the German's emphasis on attack there is no doubt that he would have scored even more than that.