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Next season, UCL will implement a new format that is very different from what we have known so far. This format will place the 36 participants who qualify into just one group and each team will compete eight times. So this will not be the same as a league match where each team has to compete against each other.
New format for Champions League post-2024: Everything you need to know
But with this rule I think every big club like City or Real Madrid will not face any problems and challenges. It is claimed that a format like this will make the match more competitive and each team will have the same opportunity to qualify for the round of 16. And there will no longer be the hardest group and the easiest group in UCL.
New Champion League format will adopt for next season make one team will play eight matches in phase round but there are not home and away match but become the league format, recently teams finished as top eight position automatically will qualify to 16 of round and while the teams finishing in 9th to 24th place will face with home and away format to get 8 ticket left for knock out round. Seems not really interested with new format because Champion League will adopt as league format as usually in domestic league, seems easily for any team reach the top six standings place get qualify to direct knock out round.
New format of Champion League will place 36 teams participants than usually has 32 participants separated on 8 groups, but next season not any group phase any more after UEFA change with league competition format.