Arsenal may now alter their summer transfer plans after a recent tactical change by Mikel Arteta has proven to be so effective. Mikel Arteta has been without Gabriel Jesus for the last three outings that Arsenal have had in the Premier League. Against Liverpool, the Spanish coach dealt with the Brazilian’s absence by tasking Kai Havertz with leading the line. The German put in an impressive shift up front, helping the Gunners to a 3-1 win against their title rivals. In the subsequent trips to West Ham United and Burnley, though, Arteta has included both Havertz and Leandro Trossard in his star…