Nike and Adidas, the two largest sports brands are dominating in terms of sponsorship in tennis. Big name players like Roger Federer, Rafael Nadal, Serena Williams, and Maria Sharapova are under contract with Nike. While top ranked players like Novak Djokovic and Simona Halep have sponsorship agreements with Adidas. Here is a list of all the sponsors for all top 16 men and women tennis players: (excluding non-tennis sponsors) *World rankings are based on January 31st 2016 World Ranking: Name: Apparel Sponsor: Shoe Sponsor: Equipment Sponsor: 1 Novak Djokovic (SRB) Uniqlo Adidas Head 2 Andy Murray (GBR) Under Armour Under Armour Head 3 Roger Federer (SUI) Nike Nike Wilson 4 Stan Wawrinka (SUI) Yonex Yonex Yonex 5 Rafael Nadal (ESP) Nike Nike Babolat 6 Tomas Berdych (CZE) Adidas Adidas Head 7 Kei Nishikori (JPN) Uniqlo Adidas Wilson 8 David Ferrer (ESP) Lotto Lotto Prince 9 Richard Gasquet (FRA) Le Coq Sportif Asics Head 10 Jo-Wilfried Tsonga (FRA) Adidas Adidas