CHELSEA vs ARSENAL was stopped during the second half as fans called for medical assistance.
Club medics were signalled over to the stand with referee Michael Oliver stopping play, possibly because a fan required help.
Players from both teams gathered in the technical area and used the opportunity to have a drink and take in tactics.
The issue appeared to come from the Matthew Harding Stand behind one of the goals and was dealt with in a matter of minutes.
Fans around the ground responded by applauding the medics, though no announcement was made.