why do tennis shirts have collars

White Dress Shirt Khaki Pants, Mens Red Dress Shirt And Tie, Mens Satin Dress Shirts Long Sleeve, Pine Green Dress Shirt, Yellow Striped Dress Shirt, Best Value Mens Dress Shirts, Men's Ivory Dress Shirt With French Cuffs, Mens 3x White Dress Shirt, Red Black Dress Shirt, Top Rated Dress Shirts, Von Maur Mens Dress Shirts, White Dress Shirt With Blue Buttons, White Guayabera Outfit, Gray Dress Shirt With Tie, Van Heusen Men's Short Sleeve Dress Shirts, Ivory Men's Shirt Wedding, Men's Untucked White Dress Shirt, Mens Burgundy Short Sleeve Dress Shirt, Versace Black Dress Shirt, White And Blue Collar Shirt, Menswear Dress Shirt, Teal Color Dress Shirt, Half Shirt For Men, Men's Hooded Shirts & Tops, T Shirt Off White, Nike Men's Hooded Shirts & Tops, Men's Flannel Shirts & Tops, Ben Sherman Shirts, Striped Shirt Men, Us Polo Shirt, Giorgio Armani Armani Exchange Shirts & Tops, White Collar Shirt, Men's Long Sleeve Polo Shirts, Black Button Down Shirt, Half Sleeve Shirt For Men, Moncler Polo Shirt, Carhartt Long Sleeve Shirts, Paul Fredrick Shirts, Pink Shirt For Men, Big And Tall Clothes, Ralph Lauren Shirts Men, Ed Hardy T Shirts, Versace Men's Shirts & Tops, Fred Perry Polo Sale, Tommy Hilfiger Shirts Men, Yellow Shirt Mens, Mens Thermal Shirt, Boss Polo Shirts, Black Button Up Shirt Men, Burberry Button Up, Burberry Men's Shirts & Tops, Burberry T Shirt Mens, Grey Polo Shirt, Keith Haring Clothing, Calvin Klein Shirts Men, Versace Silk Shirt, Mens Ralph Lauren Polo Shirts, Mens Corduroy Shirt, Next Mens T Shirts, Denim And Flower Ricky Singh, Ralph Lauren White Shirt, Men's Flannel Hooded Shirts & Tops, H&M Shirts Men, Commes De Garcon Shirt, Southern Tide Shirts, Carhartt Force Shirts, Black Check Shirt, White Short Sleeve Button Up, Levis T Shirt Men, Nike Men's Shirts & Tops