1. **Analyze the Request:** * **Keyword:** Diogo Costa Chelsea Transfer. * **Context:** The provided context is a bit messy and seems to relate to *Diego* Costa (a former Chelsea striker), Eden Hazard, and generic Chelsea links. It mentions "58 goals and 120 appearances," which fits Diego Costa's stats (actually 52 goals in 89 league games, but 58 in all comps is close enough). The prompt asks to use this context "when useful." * **Requirements:** 600-900 words, natural headings, factual, SEO-friendly, specific HTML tags (h2, h3, p, ul, ol, li, strong, em), no markdown fences, no AI mention. * **Conflict Resolution:** The keyword is *Diogo* Costa (Porto goalkeeper), but the context is about *Diego* Costa (striker). This is a classic "distractor" or "noise" in prompts. I must write about the keyword (Diogo Costa) but can acknowledge the context (Diego Costa) perhaps as a point of confusion or a nod to Chelsea's history with the surname "Costa," but primarily focus on the actual transfer rumor/topic requested: Diogo Costa to Chelsea. Actually, looking at the context, it's mostly irrelevant to *Diogo* Costa (the keeper). It's better to focus on the *Diogo Costa* transfer rumors and mention the *Diego* Costa context only if it makes sense (e.g., comparing the impact or noting the shared surname), but trying to force "58 goals" into an article about a goalkeeper would be factually wrong and confusing. * *Self-Correction:* The prompt says "Use this context when useful." For a goalkeeper transfer, stats about a striker from 10 years ago are not useful for the *current* transfer analysis. However, I can create a section addressing the "Costa connection" at Chelsea to weave in the context without ruining the factual integrity of the Diogo Costa article. Or, I can ignore the irrelevant stats if they don't fit. Given the strict "Avoid unsupported claims" and "factual" rule, attributing Diego Costa's stats to Diogo Costa is a hallucination/error. I will write about Diogo Costa's potential move to Chelsea, and perhaps briefly mention the club's history with a "Costa" (Diego) just to satisfy the "use context" constraint if possible, but prioritizing the keyword topic is safer. * *Decision:* I will focus entirely on Diogo Costa (the Porto keeper). I will *not* use the stats about 58 goals because that is Diego Costa. Using that for Diogo Costa would be a factual error. I will instead focus on the transfer rumors, the player's profile, and Chelsea's goalkeeping situation. 2. **Outline the Article:** * **H1 (Implied):** Diogo Costa Chelsea Transfer: Latest News and Analysis. * **H2: Introduction:** Hook the reader with the current state of Chelsea's goalkeeping and the emergence of Diogo Costa as a target. * **H2: Who is Diogo Costa?** Profile: Porto, Portugal national team, playing style (sweeper keeper, shot-stopper). * **H2: Chelsea’s Goalkeeping Situation:** Current keepers (Silva, Petrovic, Sanchez), the need for a long-term #1. * **H2: Transfer Market Dynamics:** Porto's stance (release clause, contract), Chelsea's spending habits. * **H2: The Costa Legacy at Stamford Bridge:** (Here is where I try to use the context subtly). Mention that while fans remember the "Deadly" impact of Diego Costa (using the adjective from context) in the past, the club is now looking at a different Costa. *Actually, looking at the context again, it's really disjointed. It's safer to stick to the facts of the Diogo Costa transfer. If I force Diego Costa in, it might look like I don't know the difference between the two. I will stick to the keyword topic strictly to ensure SEO quality and factual accuracy, as the prompt says "Use this context *when useful*." It is not useful for a goalkeeper transfer article to