Mikel Merino fully confident ahead of the opening game against Manchester United — 𝐃𝐨 𝐲𝐨𝐮 𝐟𝐞𝐞𝐥 𝐭𝐡𝐞 𝐬𝐚𝐦𝐞, 𝐀𝐫𝐬𝐞𝐧𝐚𝐥 𝐟𝐚𝐧𝐬? 🤔 #AFTVHongKong #MikelMerino #Arsenal