Arsenal manager Mikel Arteta has played down concerns involving Gunners duo Bukayo Saka and Gabriel Martinelli. The Arsenal boss spoke to the club’s media team on Thursday, two days before the Gunners are due to face Brentford in the Premier League. Arteta says he’s “pretty positive” that both Saka and Martinelli would be available for the game. However, he admitted Arsenal would have to wait and see. Saka came off at half-time in the win over Sheffield United due to illness, while his fellow attacking ace was replaced in the second half due to a cut on his foot. “We had Martinelli and Bukayo …