In the late 1970s, Bjorn Borg became the first professional tennis player to start using grass-court shoes. Today, professional players have followed in his pimped footsteps.

Tennis Channel's Prakash Amritraj explains the importance of the “pimples” on the bottom of the shoe. The bumps create tread and prevent slippery footing. You'll see the design on the bottom of most Wimbledon players' shoes this fortnight, including Roger Federer in his specially designed Nikes. 

The Swiss is well accustomed to playing, and winning, on grass, and moving across the surface with ease, and his spiked shoes help him along the way.