The injury came in a friendly for charity against the New England Revolution in Massachusetts.
Ruben Loftus-Cheek could be for several months after the Chelsea midfielder reportedly ruptured his Achilles during the Final Whistle on Hate friendly against New England Revolution.
The England international was seen leaving Gillette Stadium on crutches and will now almost certainly miss the Europa League final in Baku on May 29 in addition to the beginning of next season.
The Evening Standard reports that Loftus-Cheek faces a number of months on the sidelines, with the injury likened to that of teammate Callum Hudson-Odoi, who ruptured his Achilles in a match vs. Burnley late last month.
The injury will also rule the 23-year-old out of England's UEFA Nations League semifinal against the Netherlands in early June.
Loftus-Cheek has slowly become a key player for Chelsea over the course of the season, playing a key role in their run to the Europa League final, but is now likely to be replaced in Maurizio Sarri's starting lineup by either Mateo Kovacic or Ross Barkley. With Chelsea potentially facing a transfer ban starting this summer, pending the result of an appeal, not having Loftus-Cheek or Hudson-Odoi available going into next season would be a big blow for Maurizio Sarri's side, though U.S. star Christian Pulisic will arrive as a newcomer.