SOUTHAMPTON – Last season’s FA Cup winner Arsenal was eliminated from the competition in the fourth round on Saturday thanks to Gabriel’s own-goal in a 1-0 loss to Southampton, while Manchester City survived a scare to beat fourth-tier Cheltenham 3-1.In an otherwise close game, Gabriel's decision to try to block a shot from Kyle Walker-Peters proved decisive for Arsenal losing its hold on the cup.Right-back Walker-Peters was allowed plenty of space to overlap the Arsenal defense, but his shot looked to be heading narrowly wide of the far post before Gabriel's failed attempt deflected the ball off the post and in.