Newcastle United midfielder Isaac Hayden fears the squad may be too inexperienced for the Premier League.
Rafa Benitez's team were dumped out of the League Cup by Championship side Nottingham Forest on Wednesday night, exiting at the second-round stage for the first time in 27 years.
They also lost their opening two top-flight matches without scoring a goal and face West Ham - another team on zero points - at St James' Park on Saturday.
"If you look at the team, especially with the new signings, we're all young players," he said. "It's very difficult going into the Premier League like that. You look at the Premier League as a whole, and there are not that many young players in other teams.
"But you look at our team and you've got (Jacob) Murphy, myself, (Mikel) Merino, Jamaal (Lascelles) as captain at 23. You've got (Javier) Manquillo, (DeAndre) Yedlin, players that are between 21 and 23.
"They're not going to suddenly come here and have all the experience and the knowhow. But we're doing the best we can at the moment, and it's going to take a bit of time to gel together and get used to the Premier League."
