​LAS VEGAS – The pre-fight activities are in the books for Dana White’s Contender Series 90 following Monday’s official weigh-ins and faceoffs.For the fourth event of the season, 10 fighters will vie for UFC contracts in their fights, including welterweights Adam Darby (7-1) and Patrick Rivera (13-4), who headline the show.At the conclusion of the official weigh-ins, the fighters came face to face for staredowns. Check out the highlights in the video above and a photo gallery from the weigh-ins and faceoffs below.Dana White’s Contender Series 90 takes place Tuesday at the Meta APEX and streams on Paramout+.This article originally appeared on MMA Junkie: DWCS 90 faceoff highlights video, photo gallery from Las Vegas