Guillermo "Willie" Aubone (born 8 June 1954) is a former professional tennis player from Argentina.

He had to face seeded players in the first round of all three of his Grand Slam singles appearances.

[2] On the singles circuit, Aubone made one quarter-final, which at the British Hard Court Championships in 1981.

In 1981 he reached four doubles semi-finals, partnering Wolfgang Popp in Bournemouth, Alejandro Pierola in Bordeaux, Billy Martin in Madrid and Andreas Maurer in Quito.

He coached Mary Joe Fernández during her early professional career and spent time at the Nick Bollettieri Tennis Academy, as an instructor.