You shouldn't have to, and as for the contract situation if you're renting the Arena for the purpose of playing football matches it's surely an implied term that the venue will be of a standard that will allow that to happen. It's literally not fit for purpose.
As for what that means though in terms of reparations is another thing. The contract may well be voidable, but the club aren't going to want to do that, but If there's no specific clause included regarding compensation I don't know what you can do other than set in motion yet another court case demanding loss of earnings and/or recouping costs incurred.
From the sounds of it I doubt we can make a claim about having a new pitch as it comes across that was more a gentleman's agreement than contractual, but the pitch not passing an inspection is an avenue that is definitely open.