The 23-year-old forward was forced off in the 37th minute at St James' Park after going down clutching the back of his thigh.
Gabriel Martinelli was substituted just before half-time during Arsenal's Carabao Cup semi-final second-leg defeat to Newcastle on Wednesday; the 23-year-old joins Arsenal forwards Bukayo Saka and ...
Image: Gabriel ... front line," Arteta said before their cup defeat to Newcastle. "Those who are fit, we need to make sure they stay fit. "Leo [Trossard], Ethan [Nwaneri], [Gabriel] Martinelli ...