Arne Slot, the head coach of Liverpool, expressed his dissatisfaction with his team's performance during the first half of the match against Southampton, noting that the Reds lacked the required energy, which led to them trailing by a goal before they managed to secure a 3-1 victory.

Slot commented on the team's first-half performance: "We did not deliver the required level in the first half, not only in terms of playing style but also due to the low energy we brought into the match. However, this shows that a good team is capable of winning in different ways."

Regarding the lack of physical effort, Slot said: "The only positive thing in the first 45 minutes was that the players saved their energy for the Paris Saint-Germain match on Tuesday, as they barely ran! The energy levels were much lower than what I am used to seeing from them."

He continued discussing the team's potential, stating: "I know these players are capable of delivering a much better performance, and I expect a higher level from them during this week. I was not happy with their output, and that is why I made three substitutions."

On the substitutions and their impact, he said: "I did not congratulate the players on their level today, which is why I made changes like taking off Szoboszlai to give him more rest, and Harvey Elliott and Endo made a positive impact after coming on."

He concluded his remarks by discussing formation choices, saying: "Not starting Harvey and Endo was a tough decision, but they proved their worth after participating. If I could replay the match, I would change the starting lineup."