Juan Carlos I of Spain Spanish constitution refers to the monarch by the simple title "King of Spain". Aside from this title, the constitution allows for the use of other historic titles pertaining to the Spanish monarchy, without specifying them. This was also reiterated by a decree promulgated on 6 November 1987 concerning titles of members of the royal family. Since his abdication in 2014, King Juan Carlos has retained, by courtesy, the title and style of King that he enjoyed during his reign. Juan Carlos I of Spain Juan Carlos I (; Juan Carlos Alfonso Víctor María de Borbón y Borbón-Dos Sicilias, born 5
Juan Carlos Ferrero Juan Carlos Ferrero Juan Carlos Ferrero Donat (; born 12 February 1980) is a Spanish former world No. 1 professional tennis player. He won the men's singles title at the 2003 French Open, and in September of that year, became the 21st player to hold the world No. 1 ranking. He was also runner-up at the 2002 French Open and 2003 US Open. His nickname was "Mosquito" due to his speed and slight physical build. Ferrero retired from the game after the 2012 Valencia Open 500, returning for a brief doubles stint in 2017. Nicknamed Juanki and "El Mosquito", Ferrero