Cristiano Ronaldo was left visibly distraught on the Al-Nassr bench after a catastrophic late error from goalkeeper Bento denied the club their first Saudi Pro League title in seven years.
Everything seemed set for Jorge Jesus' side to clinch the title until the 98th minute, when a disastrous own goal from a powerful throw-in stunned the home crowd.
The Portuguese superstar had been substituted late on against Al-Hilal and could only watch as victory was snatched away in the dying seconds.
The draw means Al-Nassr must beat Damac FC in their final game to secure the championship.
Ronaldo, 41, was spotted slouching on the bench after Bento's error, staring into space with tears in his eyes.