Omeruo onazi must improve izilein

I think there may be a bit of a language barrier here!

It seems like you're trying to say that Ogenyi Onazi, a Nigerian professional footballer, needs to improve his tackling skills. "Izilein" is likely a Yoruba word that means "tackling" or "marking" in English.

So, to rephrase your statement: "Ogenyi Onazi must improve his tackling skills."

Is that correct?