Guillermo Cañas
 Guillermo Ignacio Cañas (born November 25 1977) often referred to as Willy Cañas is a retired Argentine professional tennis player. He was born in Argentina's capital Buenos Aires and named after Argentine tennis star Guillermo Vilas. His career-high singles ranking was World No. 8 achieved in June 2005. Cañas was the coach of Ernests Gulbis from July 2011 until May 2012.He now runs his own tennis academy along with former tour pros Martín García and Gustavo Oribe.