A picture of the alleged bite appeared on TMZ and shows a deep gash on a man's forearm.
He is also claiming temporary support and legal fees.
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Weir filed for divorce from Voronov, whom he married at the end of 2011 after just months of dating, in February while working as a commentator for NBC at the Sochi Olympics.
Voronov at one point claimed his figure skater husband held their dog Tema hostage Voronov, 29, claims Weir committed multiple acts of adultery - including an affair with an unidentified Chicago club owner.