The visitors equalised three times but were denied a point at Anfield by an 87th-minute penalty which saw Mohamed Salah complete his hat-trick with his second goal from the spot.
“You can never be happy in defeat. At this level errors equals goals,” said the Argentinian.
“To be able to score three goals is a positive thing, we should have created more danger when we attacked.
“We were very efficient but we didn’t create enough goalscoring opportunities. We also cannot ignore we conceded four goals. A lot of those goals could have been avoided.
“You can’t predict football but there are situations you know are going to happen—just because you know they are going to happen it doesn’t give you the security you can stop them happening.
“But when you concede goals to opportunities you feel could have been avoided it makes the disappointment bigger.”
Virgil van Dijk then traded goals with Patrick Bamford and Salah saw his 33rd-minute half-volley cancelled out by Mateusz Klich’s second-half effort, making it 3-3.
Manager Jurgen Klopp was satisfied with performance despite the concession of three goals.
“I said before the game we would struggle against them because the way they play is uncomfortable and it is different to all the other teams,” he said.
“If you don’t respect the opponent they kill you in a football way and I liked a lot the attitude of my team today. I have to say they just don’t stop, I like it.
“I didn’t see us struggling defensively but the way they play you cannot defend 100 per cent of the time.
“For the first goal both full-backs were deeper than the centre-halves and that should never happen in football. The second goal was a misunderstanding between Virgil and Ali and I don’t think we will see these situations very often.
“The third one we changed Hendo not long before and our formation was moving and we didn’t close one gap.
“The back line played for England, Holland and Scotland four days ago—all top teams but different ways of defending.
“And if things are not settled early in pre-season defending is not riding a bike—so there is space for improvement.”