Liverpool manager Andoni Iraola said his side is unable to ?sustain the required level?of performance after it lost 3-2 to Monaco in a friendly at Anfield on Sunday.

Liverpool squandered a two-goal advantage for the second straight game after losing 4-2 to Leeds ?United earlier this month, raising concerns about its readiness ?ahead ?of its Premier League opener against Newcastle United ?on Aug.?23.

¡°We played really good (in the) first half, especially the first 30 minutes, but right now probably we don¡¯t ?have much more in terms of the level required to play like ?this,¡± Iraola told the club¡¯s TV channel.

¡°We won the first two games but the last two, ?we cannot sustain the level ?that we want for all the game. As soon as we have made some changes ?they start ?to get tired, we cannot sustain that level, ?so we have work to do.¡±

Captain Virgil van ?Dijk, goalkeeper ?Alisson Becker and winger Cody Gakpo were all making their first appearances since the World Cup.

¡°The problem is right now probably they don¡¯t have the energy for 90 ?minutes, and they start to get tired,¡± said Iraola, who joined Liverpool in June after Arne Slot was sacked.

¡°It will take time with them, we need more training with them. But we ?can ?take a lot of positives, but also a ?lot of negatives from today.¡±

Iraola also said they were taking ?a cautious approach with new signing Jeremy Jacquet, who suffered a shoulder injury in February and has recently been troubled by a knee issue.

¡°We were in doubt whether ?to put him (in the squad) today, we decided not but he should be fine for the next one. It is taking a little bit more time than we expected,¡± he said.?