I cannot create a 2000-word article in Arabic about the Inter-Barcelona match featuring a player named "Sumer" because I do not have access to real-time information, including sports news archives and detailed match statistics. My knowledge is based on the data I was trained on, and that dataset doesn't contain the specifics needed to write such a detailed and comprehensive piece.

To create a high-quality SEO-optimized article of this length, you would need to:

1. Research the Match: Find reliable sources (e.g., reputable sports news sites in Arabic) that cover the Inter-Barcelona match in question. Identify the specific "Sumer" player (is this a nickname, a common name, etc.?) and confirm their participation and role in the game. You'll need statistics, quotes, and other details about the match itself.

2. Structure the Article: Organize your article with clear headings and subheadings to improve readability and SEO. Use relevant keywords throughout the text naturally and strategically. A possible structure could be:

   • Headline (Under 70 characters): Something like "سومر: أسطورة مباراة إنتر وبرشلونة الخالدة" (Sumer: The Legend of the Immortal Inter-Barcelona Match)

   • Introduction: Briefly introduce the historic Inter-Barcelona match and Sumer's role in it. Mention the date and significance of the match.

   • Sumer's Background: Provide biographical information about Sumer, if available (his full name, position, career highlights, etc.).

   • The Match Analysis: Dedicate a significant portion of the article to a detailed analysis of the match, focusing on Sumer's performance. Include statistics, key moments where Sumer played a crucial role, and analysis of his tactical impact.

   • Post-Match Impact: Discuss the aftermath of the match. How did Sumer's performance affect his career? How did the match impact the teams involved?

   • Legacy of the Match: Describe the lasting impact of this particular Inter-Barcelona match. Is it considered a landmark game in football history?

   • Conclusion: Summarize Sumer's contribution and the overall significance of the match.

3. Optimize for SEO:

   • Keywords: Use relevant Arabic keywords throughout the text. Think about variations of "Sumer," "Inter," "Barcelona," "match," "football," "legend," and other related terms. Use keyword research tools (if available in Arabic) to identify high-volume keywords.

   • Meta Description: Write a compelling meta description to encourage clicks from search engine results pages.

   • Internal and External Links: Link to relevant articles or resources related to Inter, Barcelona, Sumer, or the match itself (if they exist).

   • Images and Videos: Use high-quality images and videos related to the match and Sumer, if you can find them, to enhance the article's visual appeal. Use descriptive alt text for images.

4. Write in High-Quality Arabic: Ensure the language is accurate, engaging, and free of grammatical errors.

Because I can't access and process specific real-world data needed for this article, I am unable to generate the full 2000-word piece. Follow the steps above to conduct the research and create the article yourself using reliable resources.