Pulisic shares a strong bond with Pioli as the manager has helped revive his career following a disappointing spell with Chelsea that saw him forced out of Stamford Bridge.
Speaking to Fox Sports last month, Pulisic said: "I wanted an opportunity, and Milan really gave it to me. Pioli really kept his promises. It's not just knowing that I would play, but it's also having someone who supported me, talked about it before and that he wanted me badly.
"He gave me the opportunity to play and be myself the best way I know how, and he adjusted me to what works best for the team. I think we found a good balance in that sense. Tactics are definitely an important aspect in Italy, as everyone says. We constantly examine every possible situation in training: how we press, and how we execute set pieces. I feel I've learned a lot."