WATCH: Christian Pulisic's father goes viral for his subdued celebration after USMNT star's opening goal for AC Milan against Lazio in Serie A

Pulisic scored the opening goal in Milan's 2-0 win over Lazio on Saturday, but his father Mark was the only person that did not stand up and cheer from his section of the San Siro stands. The USMNT star's father was sat watching on, and a fan posted a video showing him before and after his son's goal, and his demeanour barely changed.

Pulisic has enjoyed a superb start to life in Italy after his move from Chelsea, scoring three goals and laying on an assist in Serie A across just eight games. His father, though, may believe he can do better.

The 25-year-old scored his first two goals for Milan in his first two games for the club, and had gone three games without a tangible contribution; against Cagliari last week he provided an assist, and then scored against Lazio.

Milan play Borussia Dortmund in their second Champions League game on Wednesday. Pulisic and Co will then prepare for a trip to Genoa in Serie A, with the international break set to come into effect thereafter.