Atlanta, the NFL only other unbeaten team, held on to second with 336 points. San Francisco received two firstplace votes and 333 points to stay third. Watt, Arian Foster and Andre Johnson, said voter John Lynch of Fox Sports.San Diego's defence came up with a big stop in the final moments. Tony Romo moved the Cowboys to the San Diego 7, where he hit Terrance Williams at the 1. Williams was stretching for the end zone when he was hit by Crezdon Butler and fumbled.

What can it rule on?Line calls. It is most commonly used on the service line with serves regularly topping 220km/h, that would test the eyesight of the most ardent carrot eaters.Players get two incorrect challenges per set and at most tournaments the expensive technology is available only on the show courts. What has it done for the sport?It has taken most of the temper tantrums out of the game and it has undoubtedly improved the accuracy of calls in the major tournaments where it is in play (you only have to mak