What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...

Walmart is making that easy right now by selling Wilson tennis balls for only $1 each. To get them for that low price, you have to buy a three-pack. Three-ball cans of Wilson Titanium All Court ...

A university tennis club has donated a "big bag" of used balls to a dog rehoming centre. Ruby Pummell and Ed Ingles from the University of East Anglia (UEA) in Norwich served-up the treat to the ...