Translating Chinese sentence

The user provided a Chinese sentence that translates to something like, "Shearer: There are many reasons for Isak's poor performance, but stop using lack of preseason as an excuse." It's unclear what the user wants exactly, so I'll clarify whether they want a full translation, a summary, or some context. Since it's straightforward, I think I can provide the translation right away and ask if they need more context. Let’s keep it concise and natural!