The Swede has gained his international clearance in the last 24 hours.
"You just want to try to get into the environment and into the team," Wilhelmsson told mlssoccer.com. "I need these trainings, all the minutes - whether it's reserve game or no - I need the minutes to get to know the team. [A debut] is always a little bit special. Just try to give everything, and we'll see."