It's standard, when an omega goes into heat, for alphas to fight it out over who gets to fuck the omega's needy hole and claim them in public. If there's a lot of alphas around who all want to fuck the omega, it's less about who gets to fuck them than who gets to fuck them first, because there's no way any single alpha can defend that kind of prize.

Yuri has always assumed he'd be a strong alpha but when he starts going into his first heat during the middle of his free skate, it becomes very clear to everyone. Even clearer when he gets gangbanged in the kiss and cry, and eventually stumbles onto the podium absolutely covered in semen.