Hanquez was born in the Northern French town of Campagne-lès-Hesdin and started playing tennis at the age of nine.

He had a win over Yevgeny Kafelnikov as a junior, when he made the round of 16 in the boys' singles at the 1992 French Open.

[2] From 1994, he competed professionally and went on to appear in the main draw of five ATP Tour tournaments, including two at Lyon.

He reached the final round of qualifying at the 1997 French Open but had to retire hurt during his match against Ramón Delgado.

[3] He and Régis Lavergne won the doubles title at the Contrexeville Challenger in 1999.