Unfair payment after quick dismissal

For just a brief moment that he was in charge with Sporting clube de Portugal, Sinisa Mihajlovic had to receive 3 million euros...at least the 51-year-old thought all sum was on his account, until the team tricked him once again.
The date was 18 June 2018 when the old management hired him as trainer, but the new fired him on the spot just nine days later. At first had to receive 12 million euros, but the highest sporting court shortened that amount to one quarter. First deadline of payment was end of 2019, additional time was asked by the Portuguese club and was given as far as 30 April 2020, where only a part has been payout since then.
Without holding a single training session with the team that time, now the Serbian coach wants to throw them out of the European league competitions for next season.