GQ mag recently chatted up with celebrity stylist Julien Farel, whose client list includes the likes of Novak Djokovic and Rafael Nadal.  When these pros want to look good, they head over to Julien's pop-up shop located right inside Arthur Ashe Stadium. His skills are so impressive that players often come in two or three times a day.

If you want to look tennis-pro-ready hair off the courts, Julien recommends using the following products:

Flexible Gel ($23)
"I've used it on Nadal's lengthy locks to Djokovic's trimmed 'do. It controls the hair without being too slick."

Vitamin Smooth ($23) "It's a smoothing creme that polishes hair with an ultra-light, smooth finish, and tames flyways and split ends. It's small and light enough to throw in your gym bag."—