United score a goal late in the second half to squeak past the Chicago Fire.
Conor Doyle makes a tough goal look easy.
Conor Doyle scored in the 73rd minute and D.C. United beat the Chicago Fire 1-0 on Wednesday night.
United heads to the midwest to begin what will be a month of games away from RFK Stadium.
Alex Morgan scored her first goal of the Women's World Cup and the United States advanced to the quarterfinals with a 2-0 victory over Colombia on Monday night.