WATCH: This is what happened behind that Andy Roddick ace

Roddick, who retired from professional tennis in 2012, hit the fastest serve in 2004 which was 249.4 km/h. (Source: AP)

Andy Roddick, Roger Federer and Rafael Nadal all have their unique serves. But what is common between them is that they all hit the ball very hard. As a spectator, you are not able to see how the tennis ball faces the brunt of this brute force with your naked eye.

[youtube http://www.youtube.com/watch?v=VHV1YbeznCo&w=100&h=400]

However, this video will show you how the tennis ball contracts in the immediate aftermath of being hit by a racket.

The slow motion video depicts how the ball almost gets swallowed up by the racket before being dispatched at 142 kmph.