WWE superstar Matt Riddle says allegations he sexually assaulted a female wrestler in 2018 are "completely false" ... claiming the accuser is an obsessed, delusional liar.
The woman behind the allegation is Candy Cartwright -- who is a pro wrestler on the indy circuit.
Cartwright levied some heavy claims against 34-year-old Riddle on Twitter this week -- describing an alleged 2018 incident when the two were on the road with other performers.
"During the van ride, when the 3 other wrestlers had fallen asleep, Matt asked me to 'hop on his d***.