UEFA have announced the Champions League final will now be held in Portugal - with 6000 fans allowed to attend.
Manchester City and Chelsea have been awaiting answers after the UK Government placed Turkey - the original venue - on to its Covid-19 travel red list.
With Istanbul out of the question, discussions were held on staging the game at Wembley but Westminster was unwilling to waive quarantine requirements for incoming arrivals.
The governing body have now confirmed the showdown will take place at the Estadio do Dragao in Porto on May 29.
Portugal is on the UK Government's green list, meaning fans, staff and players do not need to quarantine upon their return.
A UEFA statement said: "The UEFA Champions League final between Manchester City FC and Chelsea FC will be held at the Estádio do Dragão in Porto on 29 May 2021, kick off 2100 CEST, following an offer to stage the game by the Portuguese FA (FPF) and the Portuguese authorities.
"The final was originally scheduled to take place at the Atatürk Olympic Stadium in Istanbul but, following the UK government’s decision to place Turkey on its red list of COVID-19 travel destinations, staging the final there would have meant none of the clubs’ domestic fans would be able to travel to the game. After a year of fans being locked out of stadiums, UEFA thought that everything needed to be done to ensure the supporters of the two finalist teams could attend.
"UEFA discussed moving the match to England but, despite exhaustive efforts on the part of the Football Association and the authorities, it was not possible to achieve the necessary exemptions from UK quarantine arrangements.
"The Portuguese authorities and the FPF stepped in and worked quickly and seamlessly with UEFA to offer a fitting venue for the final and, as Portugal is a green list destination for England, fans and players attending the final will not have to quarantine on their return home.
"The decision does not come without big regret for the work that the Turkish football authorities have done over the last two years to ensure the successful staging of the final in Istanbul. UEFA is grateful also for their continued partnership and cooperative spirit as well as the understanding they showed in this particular circumstance and will urgently look into future opportunities for the city of Istanbul.
"The stadium capacity for the match will be finalised and confirmed in due course in cooperation with the Portuguese authorities and the FPF. However, fans of the competing teams will be able to buy tickets through the clubs in the usual way, with the 6,000 tickets per club going on sale as soon as possible from today. Arrangements for the sale of tickets to the general public will start on 24 May 2021 at 1400 CEST.
"The number of fans from each team who will be able to attend is the same as was planned in Istanbul."
