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 in Aventura, Florida along with former tour pros Martín García, and Gustavo Oribe.

After being suspended in August 2005, Cañas returned to the circuit on September 2006 at the challenger of Belém, Brazil.

Cañas holds a record of 5 victories and 2 defeats (3:1 in singles) in Davis Cup matches.

Playing style

Cañas played a defensive counter-punching game from the baseline, utilising his retrieving skills in order to frustrate opponents. He used a double-handed backhand.

Career

Early years

Cañas started playing at age 7. He turned professional in 1995, and began playing on the juniors circuit, enjoying some successes; these included a runner-up appearance at Surbiton, United Kingdom, and a win in the doubles event at the Italian Junior Championships, partnering Martín García.