UEFA has changed their ruling in order to allow players represent two different clubs in the same European cup competition from next season.
The current ruling enforces that January signings cannot play for a second club in the Champions League or Europa League if they have already featured in that competition, but by next season a club may register three new eligible players without any restrictions after the group stage.
“This is in line with the existing regulatory situation in the different domestic leagues,” UEFA added, “which does not impose restrictions on the eligibility for competitions of players registered for a new club during the winter transfer window.”
The current ruling saw FC Barcelona being unable to select Philippe Coutinho for their Champions League knockout ties because he featured earlier in the competition for Liverpool.
The same goes for Arsenal as striker Pierre-Emerick Aubameyang cannot play for the Gunners in their Europa League campaign because they were in the same competition as Borussia Dortmund, for whom he played in the Champions League before Christmas.
Other ruling UEFA added include the allowance of a fourth substitute but only in extra time of knockout ties, while up to 12 substitutes can be named in the finals — meaning that teams contesting the Champions League and Europa League finals, plus the UEFA Super Cup, can name a matchday squad of 23 players instead of the 18 allowed in the rest of the competition.
Additionally, a number of Champions League group games will kick off earlier — at 17:55 BST/GMT, although all knockout ties will keep with their kick off time at 20:00 BST/GMT.
As for the Europa League, matches from the group stage until the last 16 will kick off at 17:55 and 20:00. Starting from the quarter-finals, semi-finals and final, fixtures will all kick off at 20:00.