Fanie de Villiers

http://www.espncricinfo.com/magazine/content/story/531388.html

I used to vary my pace: 138-139kph was my average pace, but then I bowled the same delivery at 128ks an hour. That is one thing bowlers must learn. I don't see anybody varying his pace by 10ks. They all go 119 or 135. You can vary your pace by 5ks, 8ks an hour. That's when you get the midwicket catches, because the timing is a little bit different.