Seven out of Chelsea's 29-man squad on last year's pre-season tour of the United States later left the club on a permanent basis in the following weeks.
Marcos Alonso, Kenedy, Emerson Palmieri, Ross Barkley, Billy Gilmour, Michy Batshuayi and Timo Werner all went to America with the rest of the Chelsea squad but were later moved on by the club permanently in the summer transfer window. All of these players were involved in some part in the States as well.
Chelsea, though, will try to avoid a similar situation this time around when they jet off, once again, to America in mid-July. However, there is a lot for the club to done transfer-wise before next month.
