WATCH: Confrontation goes down at Las Vegas ITF

Drama unfolded on Thursday at the Henderson Open in Las Vegas between Canadian Katherine Sebov and American Alycia Parks.

Sebov let out a fierce and bellowing “COME ON!” at the end of the match. After the post-match handshake Parks looked visibly displeased, and can be heard yelling, “She squeezed my hand again!”

The details of the incident are unclear, but 20-year-old Sebov advances to the quarterfinals of the W60K, 6-0, 7-6 (9). Their first encounter was in the semifinals of a W25K in Redding, Calif. in September, in which Parks topped Sebov 6-4, 7-5.