Coaching Career Highlights
- Coached three different players (Felix Auger-Aliassime, Gael Monfils and Filip Peliwo) to six Junior Grand Slam titles
- Coached the Canadian Davis Cup team to the semi-finals in 2013
- Has been the head boys' national coach at Tennis Canada since 2007, coaching Milos Raonic, Vasek Pospisil, Filip Peliwo, Brayden Schnur and others
- National coach at the French Tennis Federation from 2002-2007, coaching Gael Monfils, Gilles Simon, Josselin Ouanna and others
Personal
- Guillaume and his wife, Melania, have three children
- He loves high-mountain skiing, spending time in the Mediterranean Sea and considers himself a 'terroir' lover