Arsenal are closing in on the signing of Ajax academy goalkeeper Tommy Setford, which will boost the club’s options in the position. Setford, 18, is set to join Arsenal for less than £1m, and he will reunited with England youth teammates Myles Lewis-Skelly and Ethan Nwaneri. Arsenal suffered a goalkeeping exodus at youth level, but with Setford following Lucas Nygaard in, the academy now has more options, and they could even step in to train with the first-team in pre-season. Mikel Arteta is also trying to add an experienced third-choice option, which would let Karl Hein go out on loan, and Ar…