Karlsson says Italiano's system is getting the best from him.
He told Corriere di Bologna: "I like him a lot, as a coach and a person. He exudes energy from every pore. He's empathetic, a real one: if he has something he comes and tells you.
"He talks a lot, gives you explanations and feedback. Italiano's game system? I feel more comfortable in this position, it brings out the best in me. Motta and Italiano ask the wingers to do a very different job.
"Is Bologna a European team? We can get there, yes. After a difficult start, we are there now, as a team I mean: we are more aware. Improve the defensive phase? I don't think my defensive phase is that bad, but maybe you who see me from the outside think I suck. Ok, it's not my specialty and I can improve it."