Boss Jurgen Klopp has said his side has no excuse falling a defeat 0-3 to Napoli despite admitting some of the players had “heavy legs”.
The European champions looked rusty and poor defensive errors meant they were 2-0 down within half an hour.
Liverpool had seven of the starting XI that beat Tottenham in the Champions League but were still without key attacking trio Roberto Firmino, Mohamed Salah and Sadio Mane, as well as Brazilian goalkeeper Alisson.
“The start and finish were good, but in between we conceded simple goals,” said Klopp. “We need to do better. I don’t want to look for an excuse and Napoli started pre-season at the same time as us but their season starts three weeks after us so they can train nice and smoothly, but we have to work hard in four weeks and sometimes you have heavy legs in games like this as a result.
“I knew before we started it would be exceptionally difficult this summer. From tomorrow [Monday], we have everyone but Sadio Mane and that’s when we can really start preparing.”