Manchester United's Nani celebrates his goal against Chicago Fire with teammate Wayne Rooney during the second half of their friendly soccer match at Soldier Field in Chicago.

Manchester United launched a second half comeback, led by Wayne Rooney, to secure a 3-1 win over Chicago Fire at Soldier Field.

New recruits David de Gea and Phil Jones made their debuts. Jones didn't have a pleasant time of it though as Cory Gibbs jumped above him, early in the first half, to direct a header goalwards with De Gea rooted to the spot as Chicago scored against the run of play.

Chicago went on to waste a host of chances as United looked shaky. De Gea pulled off a neat save with his foot off Nyarko to keep them in the game.

Rooney and Berbatov were two of five second half substitutes sent on by Sir Alex Ferguson as the English side attempted to make a comeback. Rooney continued his fine form, after scoring a hat-trick against Seattle, by fashionably taking the equalizer before Rafael and Nani sealed the win.

It saw United maintain their 100% record in pre-season, but that will face a far tougher test against the MLS All-Star team, including former Red Devil David Beckham and former Arsenal star Thierry Henry on Wednesday and Barcelona on Saturday.