Arsenal need to add a goalkeeper to their ranks if Aaron Ramsdale departs as expected, and there are several different ways of approaching this signing. Mikel Arteta can either find another goalkeeper who would genuinely challenge David Raya for a starting spot, but a similar problem to that faced by Ramsdale may again arise if he then wants to move away to play regularly elsewhere. Justin Bijlow of Feyenoord has been linked given the similar aggressive approach he adopts to Raya, but within a year or two, Arsenal may find themselves in the market for a keeper again. A young prospect could be …