The new ABBA system in Football is taken from Tennis tie breakers itself, it's just Wimbledon has a must win by 2 games rule in the 5th where the other slams don't. If they scrapped the 5th set non TB in Wimbledon it would just revert to normal TB rules where there is no real advantage when it comes to serve.
Just shows what I know about tennis Normally just watch tennis now and again when big tournaments are on, but that Isner v Anderson match was something else, Anderson will be coming to final on a mobility scooter You could see Isner was absolutely shattered nearer the end.