"Disappointed that we did not go through but not frustrated or angry. Now we can focus on the league and that's what we will do," Klopp told reporters.
Jurgen Klopp was headed for a glorious send-off in his final season at Liverpool just a few weeks ago, but talk of a potential quadruple is now long forgotten as the Reds have come off the rails.
A first home league defeat in 29 games for the Reds leaves Jurgen Klopp's men two points behind Manchester City and level with Arsenal, who can go top with victory over Aston Villa later on Sunday.
"It just was a really bad game, oh my god. We started well, really well, and then didn't continue. I think even before they scored, we just lost the plot a little bit, we were everywhere and nowhere," Klopp told reporters.
Liverpool lead the league by two points from Arsenal with reigning champions Manchester City a point further back.
Liverpool's Juergen Klopp praised Brighton & Hove Albion coach Roberto De Zerbi on Friday for implementing a demanding yet entertaining style 18 months into the job, saying he could never set his teams up to play in a similar manner.
Bayer Leverkusen boss Xabi Alonso ended speculation of a potential move to one of his former clubs Liverpool or Bayern Munich in the close season when the Spaniard said on Friday that he was committed to staying with the Bundesliga leaders.
Jurgen Klopp believes Mohamed Salah is ready to wreak more damage on Manchester United in Sunday's FA Cup quarter-final as the Egyptian gets back up to speed after a lengthy hamstring injury.
The Premier League's top three are separated by a single point with 10 games remaining as a thrilling battle between Arsenal, Liverpool and Manchester City looks set to go to the wire.
Jurgen Klopp's announcement he would step down as Liverpool manager at the end of the season was greeted with shock in his native Germany on Friday, leading to speculation he could be set for a move to the national side.
Manager Juergen Klopp has decided to leave Liverpool at the end of the season, the Premier League club said on Friday.
Jurgen Klopp said he was shocked to discover Liverpool star Mohamed Salah had suffered a hamstring injury while playing for Egypt at the Africa Cup of Nations.
"I don't want to sound like a broken record but the world will be really a different place without him, at least for me," Klopp told the club website
Klopp's side had to survive a sustained Arsenal assault at the Emirates Stadium before two goals in the closing stages gave them a hard-fought success.
Arsenal manager Mikel Arteta has called for an end to FA Cup replays to avoid fixture congestion ahead of his side's third-round tie at home to Premier League leaders Liverpool.
"We should not be really surprised that Mo can change a game, can improve in the game, because he did it hundreds of times," Klopp told reporters.
Liverpool manager Juergen Klopp said he was unhappy with the home support during their 5-1 League Cup win over West Ham United and urged fans to give their tickets away if they are not in the "right shape" for the visit of Arsenal at the weekend.
Jurgen Klopp said he is happy with the progress of his rebuilt Liverpool team as they bid to go top of the Premier League at Crystal Palace on Saturday.
Jurgen Klopp blasted an "ignorant" television presenter for making a joke about Liverpool's next game after Wednesday's 2-0 win at Sheffield United being on a Saturday lunchtime.