For this you need to start online world cup.
You need to pick a team under 2.5 stars and progress past the community average. This will be displayed when you start your world cup session on the right hand side. The problem you will have is these keep changing so there is no way to find an " easy finish"
Keep selecting teams under 2.5 stars and look for R16, this is going to be your best bet. Then continue to progress past the group stages.
If you find a sub 2.5 team and it has winner on it(This means the community average is winning the world cup), x (forfeit tournament) and try again , or of course try and win the online world cup with your selected team.
I ended up using Estonia (2.5 stars) as they have a bit of pace at the front and back.
Solution made even easier from CHRISNINETY1
As an addition, you don't even need to progress beyond (or even finish) the group stage. I picked Lebanon who had an average of going no further than the groups and just two goals. The achievement popped for me after I lost my first two games but scoring three goals in the process.
Nice one Chrisninety1.