Premier League clubs have voted to close the summer transfer window before the first game of next season.
The 2018 window will close on the Thursday August 9, two days before the first match of the next campaign, and the new rule applies only to buying players.
Premier League clubs will still be able to sell players to other leagues whose transfer windows remain open later into August and September.
The transfer window for the English Football League also remains unaffected, with clubs able to sell to lower division sides unless the EFL decides to bring its window in line with the top flight. The January transfer window remains unaffected.
Sky sources understand the decision was not unanimous; reached instead by a two-thirds majority of 14 clubs. Five clubs voted against the change and one abstained.