Arsenal manager Mikel Arteta emphasizes the importance of substitutes, calling them “finishers” inspired by rugby union. In a Champions League win over Athletic Club, substitutes Gabriel Martinelli and Leandro Trossard both scored and assisted each other. Arteta states these players can be more crucial than starters, especially with injuries to key players. He praises Martinelli’s resilience and the team’s supportive spirit after his recent drop in form.