The goal of helping referees with video review to make decisions at the 2018 World Cup has been facing key tests at FIFA headquarters. Two systems among the 11 in talks to win the World Cup contract were undergoing trials this week during training sessions with Europe's candidates to referee in Russia. An idea met with a skeptical response when then-FIFA President Sepp Blatter presented it in 2014 has support from his successor, Gianni Infantino - even if Blatter's idea of NFL-style challenges by coaches looks unlikely to survive. More...