So there are two ways to do this:
Fast & Dirty:Sim all the matches. My suggestion is you save & sim (save before you sim the match, then sim the match, if you lose, reload & sim again).
This method takes literally less than five minutes.
You can also just sim to the end from the calendar and hope for the best, but this could waste time.
Slower & More Fun:Still, comically easy as you can adjust the sliders in the "Game Settings" menu (hit
, go to the "Settings" tile, then select the "Game Settings" tile,
or
and adjust the sliders under the "User Gameplay Customization" & "CPU Gameplay Customization" to your advantage), after that just start a tournament and very daintily score massive amounts of goals until you win the tournament.
Even Slower & More Fun:Don't adjust any sliders & just play the tournament matches. The US women are still the best in the world & it should be fairly simple to win the tournament if you select them.
Regardless very easy achievement.