During his playing days with Liverpool, Jamie Carragher never tried to hide his dislike of Manchester United whenever the two rivals met.
And, despite hanging up his boots and turning his hand to punditry in recent years, the former England defender still can't help himself when it comes to taking a pop at the red half of Manchester.
Judging by his response to a tweet from former United defender Phil Neville on Wednesday night, that apparently even includes after the Old Trafford club is coming off the back of a confidence-boosting win.
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Carragher was part of the Sky Sports team covering United's EFL Cup victory over Manchester City on Wednesday, and wasn't exactly impressed with the performance from Jose Mourinho's side despite the result.
Indeed, at half time he questioned the displays of Paul Pogba and Zlatan Ibrahimovic. But, as you can see in the tweet below, it was actually the city of Manchester itself that was in the firing line after the final whistle.
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Carragher's latest dig is, of course, a reference to recent comments made by Mourinho in an interview with Sky Sports.
In it, the Portuguese manager admitted that he hadn't yet bought a house in Manchester and was still living in the city's Lowry Hotel - a venue that usually houses United's new signings when they first arrive.
The former Chelsea boss went on to discuss the difficulties of being separated from his wife and children who have remained back in London.
"Buy a house? I do not know... I do not know," said Mourinho.
"But the reality is that my daughter will be 20 next week. My son will be 17 in a couple of months. They are very stable... university in London, football in London, friends.
"...For me, it's a bit of a disaster because I want sometimes to walk a little bit and I can't," he said of living out of a hotel.
"I just want to cross the bridge and go to a restaurant. I can't, so it is really bad."
In that context, Carragher's twitter post might seem a little harsh but the Scoucer never misses an opportunity to play the villain when it comes to United.
He usually reserves his cutting comments for Gary Neville during their appearances on Monday Night Football.
This time, though, it was the brother of the former Red Devils right-back who had to deal with Carragher turning up in his mentions.
Both Neville's will be hoping they can have the last laugh this season. However, with Liverpool currently six points about their rivals in the Premier League table, they may have to wait a while.