Pulisic returned to full training this week after sitting out the Americans' 2-0 win over Australia due to a left calf injury that left many fans worried about his involvement in the rest of the World Cup.
The AC Milan star hopes to play a role in the United States' final World Cup group match against Turkey on Thursday after the side had already secured their place in the next round.
U.S. manager Mauricio Pochettino is expected to rotate his squad but Pulisic is set to start as he builds fitness ahead of the Round of 32.
The winger admitted that he has a lot of confidence in the USA side, a team who have impressed so far as they top their group.
“Two weeks off sounds crazy,” he said. “I haven't been off; I've been working every single day.”
“I'm feeling good. I've obviously joined with the team in the last few days, so I'm feeling good, positive going into it, and, hopefully, I'll be able to play a part tomorrow.”
"I just always believe that anything's possible," Pulisic said, "and I don't feel like we necessarily need some miracle to go far in the World Cup.
“I think we have a really good team. I think we can do it. Things have to go your way, just like for everyone. I just always feel like believing is better than not."
A victory on Thursday would mark the first time the USA will have claimed three consecutive victories in this competition as they aim to make history.