Many Arsenal fans were not impressed by what they saw from David Raya against Porto on Wednesday evening. David Raya produced a generally solid performance between the sticks in Arsenal’s most recent Champions League outing, up until his poor concession of a last-gasp goal. The Spanish goalkeeper has not been a universally popular figure at the Emirates Stadium this season. Earlier on in the campaign, plenty of Arsenal supporters were calling for Raya to be dropped and for Aaron Ramsdale to be reinstated into the regular starting XI. However, Mikel Arteta stuck by the summer arrival, and had l…