Arsenal have been told they must sign Alexander Isak to aid their bid to win a first Premier League title in more than 20 years. The Gunners have finished as runners-up to Manchester City in each of the last two seasons, falling just two points behind last term. In a team full of talent, they have often been accused of lacking the firepower to get them over the line . Mikel Arteta's side have been linked with a whole host of strikers in recent seasons including Viktor Gyokeres , Ollie Watkins