It was in connection with a break in the game just over halfway into United's away match against Norwich that the strange, and slightly nasty scenes, took place.
Norwich had just made a change when the Swedish team captain bent down and seemed to be having a bit of a hard time breathing.
The referee came forward, and soon also United's medical team.
Lindelöf repeatedly took care of his chest, and then stepped off the field.
The text is updated