The folk behind the brilliant online game Stick Cricket have now lauched Sticket Tennis - and have helpfully calculated that if it continues to grow at its current rate it could cost British employers £75m in wasted wages.
Stick Cricket became a phenomenon in the summer of 2005 as office workers around the country neglected their jobs to nervously follow the Ashes on www.cricinfo.com and sneak in a few cheeky games of online cricket.
As Murray-mania grips middle-England this summer be sure not to get caught by your boss as you serve and volley your way to Grand Slam glory. I warn you now it very addictive.
Give it a go (when you get home of course) at http://www.sticktennis.com