Justin Gimelstob

Ex-pro tennis player Justin Gimelstob has filed court docs to get a restraining order against the man he beat up back in October ... claiming the man is hellbent on revenge. Gimelstob was involved in a physical altercation with Randall Kaplan in Brentwood, CA on Halloween 2018. Kaplan claimed he…

Justin Gimelstob -- an ex-tennis star and broadcaster -- says he did NOT beat the hell out of a man during a trick-or-treating run last Halloween ... telling TMZ Sports he's not a violent person. As we previously reported ... Gimelstob -- a former doubles champ who's coached tennis star John Isner…