Add Yahoo as a preferred source to see more of our stories on Google. Decathlon Artengo x Gaël Monfils. (Photo: Decathlon SG) Earlier this year, France's highest-ranked and currently world no. 20 ...

Forbes contributors publish independent expert analyses and insights. Tim Newcomb covers tennis gear/business, stadiums and shoe tech. Gaël Monfils took his tennis gear sponsorship in a decidedly ...