Originally, the away goal rule was introduced in football as an expedited way of doing away with playoffs or tie breakers on neutral grounds to resolve a logistical, physical and calendar problem when two teams were so closely matched the final score over the two legs remained in absolute parity, which could remain even after a third game tie breaker. The away goals rule is intended to encourage the away team to be more aggressive. In football, at least, it can lead to a nervous first leg: the home team is unwilling to commit large numbers of players to attack lest they concede a goal, whilst the away team attempts to snatch an away goal to aid them in the second leg. Such tactics arguably make the second leg more exciting, after a low-scoring first leg leaves both sides with a chance to win. There are sometimes debates over whether the away goals rule gives an unfair advantage to the team playing away first — with the other team squandering their home advantage in the first leg due to away goal fears — and this may be a factor in its somewhat patchy adoption for competitions.