A new rule introduced to the Champions League this season left some football fans bewildered this week.
Manchester City and PSG were some of the first clubs to experience the new rule in a knockout stage of the Champions League on Tuesday evening, with UEFA tweaking their regulations for the competition at the start of this season.
Back in June, they confirmed that clubs had agreed to get rid of the away goals rule in all UEFA Competitions.
"The away goals rule has been an intrinsic part of UEFA competitions since it was introduced in 1965," UEFA president Alexander Ceferin said at the time.
"However, the question of its abolition has been debated at various UEFA meetings over the last few years. Although there was no unanimity of views, many coaches, fans and other football stakeholders have questioned its fairness and have expressed a preference for the rule to be abolished.
"It is fair to say that home advantage is nowadays no longer as significant as it once was. Taking into consideration the consistency across Europe in terms of styles of play, and many different factors which have led to a decline in home advantage, the UEFA Executive Committee has taken the correct decision in adopting the view that it is no longer appropriate for an away goal to carry more weight than one scored at home."
It led to many complaints last night from neutrals who tuned into RTE's coverage of PSG vs Real Madrid on Tuesday.
The Spanish club were set up defensively, happy to not concede and not exactly bombing forward to try get the previously crucial away goal.
Previously, a 1-0 win or even a 1-1 draw would give a team a major advantage in the second leg.
However, their plans to wrangle a 0-0 draw out of the French champions and bring it back to the Bernabeu level were scuppered in injury time after Kylian Mbappe's wonder-strike.
The rule means that, if aggregate scores are level at full-time in the second leg, games will be settled by extra time and penalties, rather than on away goals.