FIFA 17 – How to Use Real Managers in Career Mode

So I have finally worked out how to do it...

You don't need the player to have the "Flair" attribute but it does seem that you need somebody with a decent "skill moves" rating. I this case I did it with 4 stars skills rating.

The team I used was USA, and I played a 4-4-2 formation with Rapinoe and Heath up front. Who have 4-star skill and 5-star skill respectively.

I achieved the trophy with Rapinoe (4-star skills, no flair trait). However, the button combination I used was in fact L2 + R1 + O. I don't know if this is required, perhaps it just a variation modifier for flair moves... but it does do the job.

Took a few attempts but basically you don't need to receive from a pass, you can just run at the goal and press the button combo, and some times it will just do a flair shot instead of a normal shot. Net it and the trophy will pop.

One of your best options might be to use the Ultimate Team Web App and go to the "My Club", there you can use the search queries to filter down the players you have and it is much quicker than doing this with a controller (if that is indeed what you're using.) If the players you have don't meet the requirements and you need to buy someone, you can either use concept players or you could also then tie it in with the futhead squad builder web app, and this would allow you to see if your team meets the requirements, as well as giving you live updates about average prices.

You can't use the FIFA web app at the same time as being logged into the game, unfortunately, but using these tools is probably the best way to help you accomplish squad building challenges quicker. Also note that the my club sections does appear within the game, and you can also add concept players by using the search options within the squad selection screen.