A round-up of the latest Arsenal news as boss Mikel Arteta issues updates on Bukayo Saka plus Gabriel Martinelli’s fitness, and Gilberto Silva urges one player to ‘step up’. Arteta ‘hopeful’ Saka and Martinelli can face BrentfordGunners coach Arteta is ‘hopeful’ of having Saka and Martinelli fit when Arsenal play host to Brentford on Saturday. The Emirates Stadium squad can go top of the Premier League with a win against the Bees. But they may be without as many as six players, including David Raya. Raya is ineligible to face his parent club being on loan to Arsenal from Brentford. But doubts …