Liverpool's recent performance against Southampton has raised concerns for Arne Slot, who believes significant improvements are needed before facing Paris Saint-Germain. Despite securing a 1-0 victory in the Champions League first leg, Liverpool nearly faltered in their Premier League match against the league's bottom team. Will Smallbone's goal just before half-time shocked Anfield, but Darwin Nunez and Mohamed Salah's penalties secured the win.
Slot observed from the stands due to his suspension and made three substitutions at half-time. Alexis Mac Allister, Kostas Tsimikas, and Harvey Elliott were introduced after Liverpool struggled initially. By then, they had only managed two shots on target from 29 touches inside Southampton's area. Slot emphasised the need for higher intensity levels compared to their game against PSG.

The changes seemed to energise Liverpool, with noticeable improvements in attitude among all players. Slot remarked on the necessity of adapting to the intensity expected against PSG. "I made clear how difficult of a game this was and that we had to play at different intensity levels than we played against Paris Saint-Germain," he told Sky Sports.
In their previous encounter with PSG, Liverpool relied heavily on Alisson's exceptional performance. He made nine saves, setting a record for a Reds goalkeeper in a Champions League match since 2003-04. PSG dominated with 27 shots compared to Liverpool's two during that game.
Slot warned that Saturday’s display was far from what is required for their upcoming match at Anfield. He acknowledged that maintaining peak performance throughout an entire season is challenging. "I'm fully aware of the fact that if you play a season, you cannot play 38 times at the highest intensity or the best possible football you can play," Slot stated.
The Opta supercomputer predicts an 84.6% chance for Liverpool to maintain their lead over PSG and advance further in the competition. Additionally, they have a 26% probability of winning the Champions League trophy, which is higher than any other club.
Slot hopes Saturday’s first-half struggles serve as a wake-up call for his team. Reflecting on their experience in Paris, he noted that Liverpool must elevate their game significantly to compete effectively against PSG's high-intensity style.