Jurgen Klopp is unhappy with his team's overall performance in Wednesday night's EFL Cup semi-final tie.
Among other things, Klopp lamented Liverpool's reaction to falling behind after Nathan Redmond's solitary strike put Southampton in the lead.READ ALSO: FA Cup: Klopp hands Nigerian duo starting roles
Even on home turf in the same competition last season, Klopp's men walloped the Saints 6-1, but they kept the Reds' thrilling attack at bay for a second time this season to take a 1-0 lead to Anfield in two weeks in the second leg.
Redmond had three other clear chances to put the hosts in greater control of the tie, and Klopp lamented his team's decision-making as another dim performance came on the back of the weekend's FA Cup stalemate against Plymouth Argyle.
"The start was like we are usually, but after that goal we conceded the reaction was not good," Klopp told Sky Sports.
"We lost timing, we were not compact enough. Nearly everything changed and it was not good.
"It's maybe easy to explain. We made wrong decisions, we can do much better.
"It's a cup game and in an away game, if you concede a goal, it's no problem but you must react.
"The first 20 minutes showed we are on the right path, open games are difficult, they had the biggest chances because we were not compact, [goalkeeper] Loris [Karius] had to save our life a few times.
"It's a deserved win for Southampton, but only half-time, so all good." he concluded.