Marcel Granollers Pujol (Catalan pronunciation: ; Spanish: ; born 12 April 1986) is a tennis player from Spain who turned professional in 2003. He reached his career-high singles ranking of World No. 19 in July 2012, and his highest doubles ranking of World No. 4 in February 2013. Granollers has won four ATP singles titles and 16 doubles titles, including the 2012 ATP World Tour Finals. His brother Gerard is also a tennis player, and they have won five Challenger doubles titles together.
Granollers made the first round of the Wimbledon tournament in 2006, but lost to Andrei Pavel. In the qualifying rounds, he beat Stéphane Robert, Konstantinos Economidis and Marco Chiudinelli.
In 2007, Granollers won the Naples and Rome Challengers for doubles with Flavio Cipolla, and the Maspalomas Challenger for doubles with Marc López. At the 2007 French Open, he made the second round of the men's doubles tournament with Feliciano López before they lost in three close sets to the number 4 seeds Fabrice Santoro and Nenad Zimonjić, who won 7–5, 1–6, 6–4. He lost at the French and Wimbledon Championships both times in the second round of qualifying for the main draws.