Arsenal kicks off their Champions League campaign against Atalanta in Bergamo, facing a challenging opponent who recently won the Europa League. The new league format requires each team to play eight matches against different opponents, with the top eight qualifying directly for the knockout stage. Arsenal, currently in good form with three wins and a draw in their Premier League matches, will be without captain Martin Odegaard and Oleksandr Zinchenko due to injuries. Atalanta has had a mixed domestic start, showcasing their goal-scoring ability but also vulnerabilities in defense. Manager Mikel Arteta aims to improve on last season's quarter-final exit and secure a strong start in this revamped competition. The match is set to kick off at 8pm BST and will be broadcast live on TNT Sports.