To engage fans in Rafa Nadal’s retirement, AS created Dear Rafa, a participatory fan engagement system built around a pen filled with ink made from Roland Garros clay. This object was distributed nationwide, allowing fans to write personal letters to Rafa using the same material where he built his legacy. The pen became a shared medium through which thousands of supporters expressed what Rafa meant to their lives. The initiative transformed a passive audience into an active community, generating thousands of handwritten stories. Each letter became a personal tribute, contributing to a collective narrative of admiration and gratitude. All letters were collected and delivered to Rafa Nadal, completing the emotional loop between fans and the athlete. What started as a tribute evolved into a large-scale fan engagement platform, positioning AS as a facilitator of participation rather than just a broadcaster of sport.