Broadcaster and Arsenal fan Piers Morgan has now urged the North London club to sign one striker this summer. Arsenal are on the hunt for a new goalscorer. Despite being the top-scoring side in the Premier League this season, there is still a strong argument that Mikel Arteta’s squad is lacking an elite-level No. 9. Why Arsenal need a new striker this summerKai Havertz has shone as a striker for Arsenal in recent months. However, he is not the most reliable finisher, and his long-term future may not be as the spearhead of the Gunners’ attacking unit. Arteta planned to use Havertz as a midfield…