Salamanca player Miguel Garcia was rushed to hospital after going into cardiac arrest during Sunday's Segunda Division game with Real Betis.
Garcia was walking near the halfway line in the second half when he suddenly collapsed face-down onto the pitch and medical staff from both teams raced onto the pitch to aid the stricken player.
Several of Garcia's team-mates watched on in tears as the medical staff, using a defibrillator, managed to revive the 31-year-old midfielder before he was taken to Salamanca's University Hospital.
After initial examinations, where it was discovered he had suffered a heart attack, Garcia returned to the intensive care unit where a stent was put in and he will remain there for 24 hours.