England head coach Gareth Southgate dislocated his right shoulder while running near England's base camp in Repino, just outside St. Petersburg, during a scheduled day off from training.
England defeated Tunisia 2-1 thanks to a brace from captain Harry Kane in their first Group G match on Monday. In the other Group match Belgium outclassed Panama 3-0. England currently sits second in Group G behind Belgium.
The Three Lions will next face Panama before wrapping up their group campaign against Belgium.
Meanwhile, match between Tunisia and England has become the most viewed TV event of the year in the United Kingdom, BBC reported on Tuesday.
The 2018 FIFA World Cup Finals kicked off on June 14 and will continue until July 15, with the matches set to be played in 11 cities across Russia.