Merab fought Simon, you realize that right? He actually ragdolled him pretty much the whole fight, then Ricky hit a hail mary guillotine as the fight ended and Merab went to sleep right at the bell. There was confusion about who won, because Merab was way ahead on the cards. Simon ended up winning, they said Merab was out before the bell.
Bottom line: Simon bullied the hell out of Borg and won basically every grappling exchange. Merab did the same to Simon. You can connect the dots on how the grappling likely goes.