Premier League clubs will reportedly have until September 1 to do their transfer business next summer, although one club remains opposed to the change.
The about-turn comes after Arsenal, Liverpool and Tottenham all agreed that closing the window early simply had not worked.
European clubs had until Monday September 2 to complete their squads for the new campaign, while Premier League and Championship sides had to register new players by August 8.
However, August saw Spurs boss Mauricio Pochettino constantly distracted by the Christian Eriksen saga, while Liverpool had to bring in Adrian as an emergency back-up for injured goalkeeper Alisson.
The report in The Sun claims that five of the ‘Big Six’ are now supporting a return to the end of August/start of September.
Manchester United and City were both said to have been outvoted in November after trying to put the Premier League in line with the rest of Europe.
Arsenal had pushed for the early window closure when Arsene Wenger was furious at losing Alex Oxlade-Chamberlain to Liverpool in 2017, two weeks into the season.
However, they have now changed their stance, while Jurgen Klopp feels the move has not worked because European leagues have not followed suit.
Chelsea reportedly remain a stand-out in opposition to the move, with the Blues’ stance is that clubs can simply say ‘No’ to potential buyers.
Premier League clubs can debate the issue at the first shareholders meeting of the 20 members on September 12.
With a simple majority required, it is expected the matter will be formally put to a vote — with England getting in line with Europe’s biggest leagues.