A SECOND boxer needed oxygen on the Tyson Fury vs Oleksandr Usyk undercard.
Frank Sanchez was knocked out by Agit Kabayel in the seventh round of their heavyweight bout in Riyadh ahead of the main event.
And the Cuban, 31, required medical attention inside the ring immediately after being brutally stopped.
That included doctors administering first aid by putting him on oxygen.
German Kabayek, 31, watched on concerned as he took on water following the bout.
His flurry of massive body shots proved the undoing for Sanchez as he eventually succumbed to the pressure and went down on the canvas.
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The boxer was down on his hands and knees desperately trying to steady his breathing.
But after the referee counted to ten, he waved it off just as Sanchez was getting back to his feet.
The end of the fight, though, enabled the medics to rush into the ring and assist.
The defeat was the very first loss of the Cuban Flash's professional career, after 24 wins and a no-contest result from his 25 fights.
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Tragically Sanchez's medical emergency help came just minutes after Joshua Wahab also required oxygen.
The Nigerian was smashed out in the first round by Mark Chamberlain.
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The 33-year-old's team quickly surrounded him and hooked him up to an oxygen mask to ensure he was okay.
Fortunately he was able to sit up and appeared to avoid any complications after the heavy hits.
Wahab's record has now taken a hit, as the first-round knockout was his second career loss - leaving his record at 23-2.
Both Fury and Usyk are putting their unbeaten records on the line when they step into the ring for the biggest fight of the century.