Formula for perfect spot kick revealed

University eggheads have unveiled a formula for the perfect spot kick - leaving no excuse for footballers who're prone to fluffing penalties.

Researchers, who studied hour after hour of footage to reach the conclusion, say the formula promises 100 per cent success.

According to them, the shot should be 65mph or more, which requires a run-up of five to six paces, commencing from the edge of the 18-yard line - approaching the ball at an angle of 20 to 30 degrees.

And it must cross the goal line at exactly 0.5m below crossbar and 0.5m inside either post.

Using Sky Sports high definition cameras installed at the back of goal nets, boffins at Liverpool John Moores University analysed spot kicks.

"Many factors make up a 'perfect penalty'. But we've finally nailed the key elements," The Sun quoted Professor Tim Cable, director of sport and exercise sciences, as saying.