Nketiah hails arsenals mature performance against portsmouth

I think there may be a mistake here!

Eddie Nketiah is a professional footballer who plays as a striker for Arsenal, but I couldn't find any evidence of him making a statement about Arsenal's performance against Portsmouth.

Arsenal does not have a regular fixture against Portsmouth, as Portsmouth is a lower-league team that has been relegated to the English Football League One. However, Arsenal has played against Portsmouth in cup competitions, such as the FA Cup, in the past.

If you could provide more context or clarify what you're referring to, I'd be happy to try and help!