Got it, let's tackle this article. First, the keyword is Diego Costa Chelsea Country, right? Wait, first I need to structure the headings naturally. Let's start with an h2 introduction that sets the context of his time at Chelsea, maybe mention the country angle first? Wait no, let's see: first, maybe h2: Diego Costa’s Defining Chelsea Spell: A Look at His Roots and Stamford Bridge Legacy? Wait no, make it natural. Wait first, the core is his country (Brazil, but he played for Spain, right? Oh right, that's a key point. Wait let's outline: First h2: Diego Costa at Chelsea: A Striker Forged Across Borders Then first paragraph: Introduce that while he's a global football name, his Chelsea tenure is tied to his cross-country football identity. Mention he was born in Brazil, represented Spain internationally, that's the country angle. Then mention his stats: 58 goals, 120 appearances over 3.5 years at Stamford Bridge, that's from the context. Then next h3: Early Cross-Country Football Journey Before Chelsea Wait, talk about his early career: born in Lagarto, Brazil, came through Grêmio, then moved to Portugal, then Spain with Atlético Madrid, where he became a star, then the move to Chelsea in 2014. Oh right, that's the country part: Brazilian-born, Spanish international, that's the key for the keyword. Then h3: Deadly Form at Stamford Bridge: A Fan Favorite Here talk about his playing style: the "deadly" (from context) physicality, pressing, clinical finishing. Mention his debut season 2014-15: won the Premier League, scored 20 league goals that season, right? Wait, avoid unsupported claims, so stick to known facts: 58 total goals for Chelsea, 120 apps, 3.5 years. Mention his iconic moments: that goal against Liverpool in 2014, the celebration, the rivalry with Manchester United, etc. Also, mention that despite his Brazilian roots, he became a cult hero at Chelsea, the fans loved his tenacity. Wait then h3: International Country Allegiance: Brazil to Spain Oh right, that's a key part of the keyword. Explain that he was born in Brazil, played for Brazil's youth teams, but then switched allegiance to Spain, where he had lived for several years, made his Spain debut in 2014, played in the 2014 World Cup, Euro 2016. That's the country angle, perfect for the keyword. Then h3: Legacy and Later Chelsea Stints Wait, he left Chelsea in 2017 to go back to Atlético Madrid, then returned briefly in 2018-19, right? Mention that his two spells at Chelsea added up to that 3.5 years, 58 goals, 120 apps. Talk about how he's remembered as one of the most impactful strikers of the 2010s for the club, his no-nonsense style, the way he embodied the club's fighting spirit. Then a conclusion h2? Wait no, maybe a final h2: Diego Costa’s Enduring Chelsea Legacy Wait also, the context has the social links? Wait no, wait the user gave context with Twitter and Facebook links? Wait wait, let's check the context again: the user listed: - Deadly - The big Spanish striker notched 58 goals and made 120 appearances for the Blues over a three-and-a-half year spell at Stamford ... - Diego Costa - Twitter : https://twitter.com/CFCVideos ▷ Facebok : https://www.facebook.com/CFCVideos14 ▷ - Chelsea - Check out my new video with - Diego Costa - Here are Wait, so maybe include a callout? Like, if readers want to relive his best moments, check out the linked social pages? Wait but make it natural. Wait also, avoid unsupported claims, so don't make up stats. Let's make sure the word count is 600-900. Let's draft: First, h2: Diego Costa at Chelsea: A Cross-Border Striker Who Defined an Era Then first paragraph: When discussing the most impactful forwards in 21st century Chelsea history, Diego Costa