his squad didn't update right away after he bought the player.. probabbly this happenes sometimes, not often but it does.
If you tried to send a friend request.. he would have accepted and then you can check it out.
I know that whenever you'r trying to check his team, it says Loading but not always its up to date, you would have to relog and check, to be sure. No way to check unless you manage to find his team somewhere in your Champions League opponents league.