Jurgen Klopp and Pep Guardiola were among the Premier League managers angered by Thursday's vote to reject five substitutions.
It was the third time the change from three subs to five has been voted on this season and the decision to retain the status quo was branded 'short-sighted' by those on the losing side.
Manchester City boss Guardiola and Liverpool's Klopp have been advocates of reintroducing five substitutions and were severely disappointed on Thursday amid growing concerns over player welfare.
Klopp had claimed at least 15 out of 20 managers were in favour of increasing the number of replacements from three to five — but on Thursday only 10 clubs voted in favour of the rule-change during the final shareholders' meeting of 2020.