Arsenal legend Martin Keown has described the build-up to Gabriel Jesus’ opener against Nottingham Forest as “ridiculous”. The Highbury icon, speaking on TNT Sports, could barely believe the hosts’ defending against the Gunners for their breakthrough. Arsenal needed some time to wear down the Forest defence at the City Ground, but they were effectively handed their opener on a silver platter. Oleksandr Zinchenko weighed in with a quick throw-in, which Gabriel Jesus took in his stride past two Forest defenders. From a very tight angle right on the byline, the 26-year-old poked the ball through …