Liverpool chief executive Rick Parry has called for the introduction of a fourth substitute when a match goes into extra time.
Parry believes the rules need to amended following a dramatic FA Cup final at Cardiff's Millennium Stadium yesterday.
Liverpool twice came from behind to defeat West Ham on penalties after the game finished level at 3-3 at the end of extra time.
A number of players on both sides were clearly exhausted and Parry told Radio Live Five Live's Sportsweek programme: 'Maybe a fourth sub might be allowed in extra time.
'It would make things a bit less of a lottery. Having watched a replay of the game, we had a number of players going down with cramp.
'Marlon Harewood played well for 90 minutes (for West Ham) but was a passenger in the end.'
Parry is confident that inspirational captain Steven Gerrard will be content to remain at Anfield after the FA Cup was secured.
Gerrard was outstanding and gave England a boost as well ahead of the World Cup.
Parry said: 'We have never had any intention of selling him at any stage. He is fully committed to the club and has got a lot left in him. His ambition -which is ours - is to win considerably more trophies.
'We are never complacent. I am sure he will remain happy and committed here if we continue to improve. Once again, he was immense against West Ham. It was a great contribution from our captain.'
Parry revealed that plans to strengthen the squad in the close season had been on-going since January.
Liverpool finished third in the table behind champions Chelsea and Manchester United.
He said: 'We have one or two players lined up and perhaps there will be one or two more. We are always thinking about trying to improve and doing things the right way.
'Clearly we have made a huge improvement in our league form and that has been hugely satisfying.
'Next season we will try and do better. If we continue to do that, one day the league title will follow.'