Monitoring a gentleman's sport

You may root for the players when you watch them duel on a tennis court, but there's a whole army of people working behind the curtains to ensure maximum pleasure for the fans as well ensuring the greater good of the game. Chair umpires and line umpires are only two groups of this vast army. Mint gets a lowdown on them, their life and times of the court and how to become one, if you're interested. 

http://www.livemint.com/2010/10/20211307/They-know-where-to-draw-the-li.html