TEMPERS frayed as Cristiano Ronaldo's Al-Nassr took on rivals Al-Ahli in the Saudi Pro League.
And that led to play being halted after Ronaldo's team-mate was hit on the head with a water bottle.
The incident occurred after Ronaldo thought he had put his side 1-0 ahead.
Bottles rained down on the Al-Nassr team as they celebrated, with one catching Otavio on the head and bursting on impact.
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The player immediately collapsed to the floor, and his team-mates pleaded with the crowd to stop launching projectiles.
It was a hostile atmosphere from the start at the King Abdullah Sports City, with fans chanting Messi's name at Ronaldo throughout.
Al-Ahli are one of four teams owned by the Saudi government's Public Investment Fund and have stars littered throughout their side.
Rivalling Ronaldo's Al-Nassr, Al-Ahli boast Roberto Firmino, Riyad Mahrez and Allan Saint-Maximin as part of their roster.
Al-Nassr would go on to win the game 1-0 through a Ronaldo penalty - giving him the last laugh in the end.
After scoring, Ronaldo and co playfully gave a bit back to the Al-Ahli fans.
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Fully prepared for the barrage of water bottles this time, the players did tricks and kick ups with the bottles.
Ronaldo is the top scorer in the Saudi league, with 23 goals to his name this season.
The goals haven't been enough to fire Al-Nassr to the top of the league, however, as they trail Al-Hilal by nine points.
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Al-Hilal are unbeaten in the league and have won their last 28 games on the bounce.