There's only a few hours to go until Liverpool welcome Manchester United to Anfield for what is one of the most eagerly anticipated games between the two sides in years.
The cross-city rivalry is always a must-watch affair. However, with Liverpool flying high under Jurgen Klopp and Jose Mourinho trying to convince his critics at United, tonight's game has everyone talking.
As it turns out, that also includes former players for the respective Premier League clubs. That's after Rio Ferdinand tried to goad former Liverpool stalwart Jamie Carragher on Twitter this afternoon. The exchange that followed was predictably brilliant.
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Usually, it is Ferdinand's former teammate at Man United, Gary Neville, who is the one trying to get a reaction from Carragher on social media.
But, with such a big game ahead this evening, it was the ex-England centre-back who couldn't help himself on Monday by bringing up a classic image from an old United-Liverpool tussle.
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The image, heralding from United's 2-1 victory over their rivals in 2004, was clearly sent with one intention, and one intention only - to wind up Carragher as much as possible.
And it didn't take long for the Liverpool man to reply with a typically sarcastic message of his own.
Anyone who is a follower of either player will know that they both like to have the last laugh and, as you might expect, their Twitter banter didn't end with Carragher's post.
Trying to get the upper hand once again, Ferdinand's next reply was one that was guaranteed to hit Carragher (and any Liverpool fan of the Premier League era) where it hurts. How did he do that? By bringing up United's recent history of winning titles.
Ferdinand may have thought he had landed the knockout blow with that tweet, but Carra wasn't done there.
And his final reply - at this point - may have just given Liverpool an early lead on this important day.
Landing a transfer bombshell and shot at United in the same 140 character message is an impressive feat.
Ferdinand didn't muster much of a response this time...
Although the game itself might still be a few hours away, it looks like Liverpool are 1-0 up at this stage thanks to Carragher.
However, there is still plenty of time for Ferdinand and the current crop of United stars to hit back.