ATLANTA — Josef Martínez scored twice in the second half, pushing his league-leading total to five, and expansion Atlanta United won its second straight, defeating the Chicago Fire 4-0 on Saturday.

Chicago (1-1-1) dug an early hole, conceding an own goal in the fourth minute and then having Johan Kappelhof sent off with a red card in the 11th minute.

The own goal — Julian Gressel's cross from just out of the box on the right deflected off Brandon Vincent and went past keeper Jorge Bava— was enough for Alec Kann to post the first shutout in Atlanta (2-1-0) history.

Martínez, who had a hat trick in last week's 6-1 win over fellow first-year team Minnesota, sandwich his goals around the first for Héctor Villalba.

Miguel Almirón set up Martínez in the 60th minute, Villalba scored unassisted seven minutes later and Martínez capped the rout in the 82nd minute, assisted by Yamil Asad.

Kann, who had two shutouts last season as a backup for Sporting Kansas City, had three saves.

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