Arsenal only have a few days left to sign an attacker before the transfer window closes, but it is still unclear who could arrive. The Gunners have been linked with a long list of strikers and wingers in the last few months, with Mikel Arteta keen to add more firepower to his squad. It now appears that Arsenal will target a depth option, having been rejected by Benjamin Sesko, and Nico Williams also appears reluctant to leave Athletic Bilbao. Arsenal may need another attacker to beat Manchester City in the title race, but with Pep Guardiola selling Julian Alvarez to Atletico Madrid, they are a…