FILE PICTURE - Birmingham City's Nico Vaesen saves the penalty from Norwich City's Philip Mulryne. The perfect formula for saving a penalty has been calculated - on the eve of the FA Cup Final. See NATIONAL story NNPENALTY. Scientists claim to have worked out how Manchester United's David De Gea or Chelsea keeper Thibaut Courtois could be their team's saviour at Wembley on Saturday. The equation may have helped Peter Shilton, David Seaman or Paul Robinson end England's half century of hurt in major competitions. And perhaps it could even help Jack Butland, Jordan Pickford or Nick Pope become England's World Cup penalty shoot-out hero in Russia this summer. But they would probably need a degree in mathematics to understand it. The equation takes into account the goalkeeper's perpendicular, or lateral, speed or velocity (VGK), where the ball crosses the line (XB) and his starting position (XGK). This is divided by the time available before the kicker strikes the ball (TTCPT) and the period it is in flight (TTCB). The Dutch team say it will enable goalkeepers to time their dives perfectly - which is key to saving a penalty.,Image: 372041349, License: Rights-managed, Restrictions: follow us on twitter - @swns browse our website - swns.com email [email protected], Model Release: no

SURSĂ FOTO: PROFIMEDIA

SURSA FOTO: PROFIMEDIA