FAYETTEVILLE – Arkansas was down one (54-53) with 9:41 to play before going on an 18-3 over an eight-minute span to claim an 81-74 victory over Mercer in the teams’ 2021-22 season opener at Bud Walton Arena. The 15th-ranked Razorbacks forced seven turnovers during the span and held Mercer to 1-of-7 shooting. The Hogs scored…