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Chelsea must conclude our summer transfer business on October 5, according to statement from UEFA.
The European governing body want all transfers to be completed before the registration date for UEFA competitions next season, which lands on 6 October.
A UEFA statement read: “The deadline for player registration for the group stage of the 2020/21 UEFA club competitions has been set to 6 October 2020.
“As a result, the UEFA Executive Committee called on all member associations to adopt a harmonised end date to the upcoming summer transfer window, with this date set as 5 October 2020.”
The Premier League is yet to announce when the Premier League summer transfer window will open but Premier League chief executive Richard Masters has said that the window will not open before the end of the current season on 25 July.