In June 2012, Mantorras returned to Benfica as club ambassador. The following month, on the 18th, he received a testimonial match at the Estádio da Luz, facing an All-Star team which included Luís Figo, Edgar Davids, Luís Boa Morte, Teddy Sheringham, Dwight Yorke, Paulo Futre, Ronaldo, Francesco Toldo, Fabio Cannavaro, Fernando Couto, Míchel Salgado, Serginho, Pauleta, Juliano Belletti and Mateja Kežman, and netting the fourth goal in a 5–1 win; after the match he praised the club fans in an interview, and dedicated his goal to them for all the support he received during his spell. His former manager Jorge Jesus praised his efforts, as well as the money raised in the game by both teams.