By Ewan Murray Arsenal are aiming to close the gap on Manchester City and Liverpool this weekend when they visit Newcastle United in the Premier League. The Gunners have dropped five points in their last two outings and could be cut adrift from the Cityzens and the Reds should they fail to beat Newcastle at St James’ Park in Saturday’s early kick-off. It’s a fixture they have lost in two of the last three seasons and such a slip-up at the weekend could prove fatal to their Premier League title bid. Mikel Arteta will be sweating on some late fitness tests ahead of the trip to Tyneside, with the…