Premier League chief executive Richard Masters says Pep Guardiola and Jurgen Klopp are likely to be disappointed in their bid to increase the maximum number of substitutions from three to five.
Teams were allowed to make five changes per match when football returned following the coronavirus-enforced shutdown last season, as part of Project Restart.
That was due to the number of matches being played over a short period of time after the lengthy lay-off.
However, it was only a temporary measure and the old rule returned for the start of the 2020-21 campaign.
Some are arguing that five subs are still required for the benefit of player welfare - due to the shorter than usual close season and later than usual start to the campaign, which has caused more fixture congestion, especially for clubs playing in European competitions.
Manchester City boss Guardiola and Liverpool counterpart Klopp spoke on the issue following Sunday's 1-1 draw between last season's top two sides at the Etihad Stadium.
They are in favour of five subs - but the likes of Sheffield United do not share the view, claiming it would favour the bigger clubs.
Masters was quizzed on the matter - among other topics - during his appearance at the Digital, Culture, Media and Sport parliamentary select committee on Tuesday.
He stated that he did not see the rule changing in the near future.
"It's another one of the issues that has been thrown up by the pandemic," said Masters.
"We went to five subs, as you know, during Project Restart, because there had been a long lay-off, and we were playing 92 games in short order.
"And there was clearly a case to be made for the continuation of that - in fact, most European leagues have done that.
"There is an argument to be made that five substitutes changing the competitive balance of the football match, versus the very real issues about player welfare.
"I think it's a finely balanced argument.
"We've had two votes on it at club level and both have been relatively conclusively supportive of three subs - ie, returning to that model, which has been the historic one.
"That has created some frustration in the system, which you are seeing, alongside discussions about the fixture scheduling, which again is a pandemic-related issue.
"Obviously clubs had a very short period of time - some clubs much shorter than others - to prepare for this season and we're going into a slightly truncated (season).
"We normally start in the first week of August and we started in the first weekend of September, so you're missing a month.
"So we're trying to pack all of those games into a shorter period of time.
"So you can see why it is an issue for debate, particularly if you are, in Jurgen and Pep's case, competing in Europe."
Masters added: "It is busier and it's also coupled with the fact that we ended the season at the end of July and not the end of May, and the normal rest periods haven't been taken into account.
"So there's a real issue there and it has been discussed at length. I don't foresee it changing in the foreseeable future."
