Since he arrived from the lower ranks of Brazilian football, Gabriel Martinelli hasn’t always enjoyed the best of luck with injuries at Arsenal. Martinelli suffered a serious knee injury during his first season at the Emirates Stadium, something that initially halted his progress at Arsenal. Since then, Martinelli hasn’t suffered from anything too significant, but he’s consistently endured little set-backs and pains that have affected his match sharpness. That being said, Martinelli looks to have finally regained his confidence and edge in recent games, starting to overcome a difficult few mon…