Infobox last updated on: 7 February 2009.
Guillermo Sebastián Coria (born January 13, 1982 in Rufino, Santa Fe Province), nicknames include El Mago (The Magician in Spanish) and El Chino, is a retired professional tennis player from Argentina who is best remembered for losing the 2004 French Open final. He was named after tennis champion and fellow countryman Guillermo Vilas.
Coria utilized the Head MicroGel Radical Pro. His racquet was strung with Luxilon Big Banger Original 16 String at a relatively low tension (50-52 pounds). His clothing sponsor was adidas.