England's matches at the Euros this summer have been decided by the finest of margins so far, and if history is anything to go by, the final will be no different.
Five of the last six finals have been decided by a solitary goal, apart from Spain’s 4-0 procession against England's sparring partner on Sunday, Italy, in 2012.
So it's likely that substitutions will have a big part to play.
You don't even have to trawl back far through the archives to find a Euro-winning super-sub, remember Eder?
How many subs can England make?
As has been the case throughout this summer’s tournament, both sides will be allowed to make a maximum of five substitutions during the first and second halves.
However, while they may have two additional substitutions on top of the standard three, they continue to have three stoppages to make changes to their 11.
These stoppages are only used up during play, therefore, substitutions made at half-time do not count towards this total.
What if it goes to extra time?
Panic... no, sorry, it's not that confusing at all really.
If the match is level at the end of 90 minutes and the two teams head into extra time, then Gareth Southgate and his opposite number Roberto Mancini will be afforded an additional substitute on top of the original five, taking the total number to six.
As well as the extra substitute, both sides will also have an extra stoppage allowed in order to make the change.
