The post-match handshakes at Old Trafford told their own story, but it was Cody Gakpo's request for Casemiro's shirt that sparked the biggest debate among Liverpool supporters.

After watching his side surrender a potential Champions League-securing victory in a 3-2 defeat to Manchester United, some fans took issue with the Dutch striker's apparent shirt swap request to the Brazilian midfielder.

The criticism came swift and sharp on social media. "Gakpo asking for Casemiro's shirt there. Embarrassing, man. What's happened to this club?" one supporter questioned, capturing the frustration of those who felt the gesture was inappropriate after such a damaging defeat.

But the backlash to the backlash was equally fierce. Liverpool fans quickly rallied to defend their striker, with many arguing that mutual respect transcends results. "It doesn't matter who's shirt they ask for, get a grip," one supporter countered, whilst another added: "Brother let it rest, it's just mutual respect."

The incident reflects the raw emotions following a performance that left much to be desired. Liverpool found themselves two goals down within just 14 minutes, with Matheus Cunha and Benjamin Sesko capitalising on early defensive fragility.

To his credit, Gakpo was central to Liverpool's fightback. Starting up front in Arne Slot's system, the Dutch international scored the equaliser just before the hour mark, bringing the Reds level after Dominik Szoboszlai had already pulled one back following the interval.

But football's cruel reality struck again when Kobbie Mainoo found the net in the latter stages, consigning Liverpool to a defeat that cost them the chance to secure Champions League qualification with games to spare.

Slot's post-match assessment was brutally honest about his side's tactical shortcomings. "We weren't able to control their strengths," the Liverpool boss admitted. "We were aware that they had strengths, two of them are set-pieces and the counter attack."

The manager's analysis cut to the heart of Liverpool's problems. "The first goal we concede is a set-piece and the second one you have to know where to lose the ball against United, who are really strong and aggressive in a low block and you play the ball into the middle where is Casemiro and Mainoo and their center-backs."

Slot recognised the danger of United's transition game, explaining how his side fell into familiar traps. "If you lose it they have so many fast players, and Bruno Fernandes to hurt you in transition. That is exactly what happened."

The comeback showed character, but also highlighted ongoing issues. "We were 2-0 down and came back in the second half to 2-2, but as always we were to switch off in one moment and conceded the goal," Slot reflected.

Tactically, the manager acknowledged his side's approach needed refinement. "We had a lot of ball possession. One of their strengths is also defending in a low block and [launching] a counter attack. That's why in the second half I tried to play a bit more on both sides with the wingers. We went, in the first half, a little bit too much for the middle and they counter you."

The shirt swap controversy speaks to something deeper about modern football fandom. In an era where every gesture is scrutinised and emotions run high, the line between respect and perceived weakness becomes increasingly blurred.

Gakpo's critics see a player too comfortable in defeat, whilst his defenders see someone maintaining the values of sportsmanship even in disappointment. Both views reflect genuine passion for the club, even if they manifest differently.

What's certain is that Liverpool's focus must quickly shift from post-match etiquette to pre-match preparation, because performances like this Old Trafford showing won't secure the top-four finish that remains within reach.