Former Swansea striker Bafetimbi Gomis fainted during Galatasaray's game on Sunday, but was allowed to continue playing.
Gomis appeared to lose consciousness but was given permission to return to the field by medics during the game against Kasimpasa.
The incident occurred in the seventh minute of the game as Gomis fell to his knees before eventually collapsing to the ground as players lined up for a Galatasaray corner.
In 2009 Gomis was diagnosed with vasovagal syncope, a form of low blood pressure.