GettyAditya GokhaleArsenal legend Paul Merson tells Mikel Arteta which striker he must sign this summer to take Gunners to 'another level'ArsenalM. ArtetaA. IsakPremier LeagueTransfersFormer Arsenal star Paul Merson believes that the Gunners will hit higher levels next season if they sign Newcastle United striker Alexander Isak.Article continues belowArticle continues belowArticle continues belowArticle continues belowArsenal battling Manchester City for titleMerson thinks Isak can take them to 'another level'Gunners looking to sign a striker this summerWho will win the Premier League title?Manchester CityManchester UnitedLiverpoolArsenalChelseaOther52422 Votes