Arsenal look set to strengthen their attack in the summer transfer window, with recent games showing that they still need reinforcements. Although Mikel Arteta’s side are one of the highest scorers in the Premier League, with Kai Havertz beginning to thrive as a centre forward, back-to-back defeats to Aston Villa and Bayern Munich saw them fail to take their chances in front of goal. Arsenal have been linked with several centre-forwards including Viktor Gyokeres and Benjamin Sesko, but a Premier League-proven option could be Newcastle star Alexander Isak. Arteta was interested in the Sweden st…