Technology is supposed to make life easier, not the other way around. Yet when it comes to football, it often seems to have made the game more complicated, raising more questions than it answers.

For years, football authorities have promoted technology as the answer to the game's biggest controversies. Goal-line technology, semi-automated offside systems and the Video Assistant Referee (VAR) were all introduced in a bid to make the sport fairer and more accurate.

Pep Guardiola says teams must "do better" if they want to avoid VAR controversies.