Liverpool manager Andoni Iraola said his side are unable to sustain the required levels of performance after they lost 3-2 to Monaco ​in a friendly at Anfield on Sunday. "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.