Debate over the merits of video assistant refereeing was again raised as a Romelu Lukaku double eased Manchester United into the FA Cup quarter-finals in a 2-0 win at Huddersfield despite a controversial call going against Jose Mourinho's men.

FIFA boss Gianni Infantino rates the trial of new video referee technology at the Club World Cup a "positive" step towards its intended use at the 2018 World Cup in Russia.

Cristiano Ronaldo said he had answered his critics in style as he rounded off a "spectacular" year with a hat-trick to win the Club World Cup for Real Madrid and add to his multitude of titles.