Rafael Nadal expresses his emotions after being honored at the French Open for his retirement from tennis. (0:57)Open Extended ReactionsPARIS -- A day after the French Open honored Rafael Nadal on court, dozens of spectators began selling the clay-colored "Merci Rafa" T-shirts handed out at Sunday's tribute -- with some listings reaching up to $540. A day after the French Open honored Rafael Nadal on court, dozens of spectators are selling the "Merci Rafa" T-shirts handed out at the tribute. "It's a bit sad to see people profit off the 'Merci Rafa' shirts. Moretton said he had not received a shirt himself, despite standing just a few feet from Nadal during the tribute.