Joshua Zirkzee is earning interest from Arsenal, AC Milan and Manchester United for the summer transfer window, and the Bologna forward now has a ‘clear’ preference. Strikers are set to play a key role in the upcoming sales as sides from across Europe strive to take their attacks to a higher level. Mikel Arteta is one manager exploring the market for his next centre-forward at Arsenal, where Gabriel Jesus and Eddie Nketiah have had difficulties. Erik ten Hag is also bidding to build on Rasmus Hojlund’s first season at Manchester United. The 21-year-old made the move from Serie A to the Premier…