Former Liverpool player Graeme Souness has cast doubt over Arsenal’s Kai Havertz, despite the forward’s good run of form lately. Souness insisted that the Germany international is not aggressive enough. Havertz has been a decisive player for Mikel Arteta’s side as they have taken the Premier League title race down to the wire. The 24-year-old has scored or assisted nine times in Arsenal’s last 13 Premier League matches. Speaking about Havertz, the Scotsman said, as quoted by HITC: “I think they [Arsenal] need something else, yeah, I do. I still have reservations [about Kai Havertz]. I don’t th…