If somebody sends you an invite, you can join an Association prior to reaching training level 8.
However, our advice is to continue playing Top Eleven, make your team stronger, and when you reach training level 8 (or club level 2) you can show your best performance in the Association tournaments.
However, our advice is to continue playing Top Eleven, make your team stronger, and when you reach training level 8 (or club level 2) you can show your best performance in the Association tournaments.