Bastian Schweinsteiger scored after 17 minutes of his Chicago Fire debut against Montreal Impact at Toyota Park.
The 32-year-old netted with a powerful header at the far post, converting David Accam's cross to give the home side a 1-0 lead over their visitors.
Schweinsteiger only arrived at his new club on March 21 after a disappointing spell as a Manchester United player, and he was unveiled just three days before being given his first start by coach Veljko Paunovic.
Fire went into the match against Montreal having taken a draw, a win and a defeat from their opening three games of the MLS season.