They are often competitive casualties cast aside after a match, but tennis balls are bouncing back to life thanks to a recycling center as big as a ball machine. Meet the Green Machine.

Then, tap or click the tennis ball icon to start the game ... as sometimes your character or opponent will appear as the small green robot mascot. Read more: These are the social media platforms ...

Advertisement Then they take to the purple and green hard courts with the big ... because it is less dense. But a tennis ball has an outer layer of felt, which absorbs water molecules as it ...