FIFA wants to allow teams to use five substitutes when football resumes due to the congestion caused by the coronavirus pandemic.
Football's world governing body is proposing upping the number of changes allowed in 90 minutes from three to five - with a sixth in extra time of knock-out games - to help combat injuries with more games to be squeezed into a shorter amount of time.
With league seasons, domestic cups and continental competitions such as the Champions League and Europa League due to be completed, some teams face a huge number of matches once the 2019-20 campaigns are permitted to resume - should that be possible.