Several times Rafael makes horrible challenges, but other than that, he is a good player.
By showing interest and continue making several bids. And if the player is interested in joining your club , he'll surely hand a transfer request.
Can you give a clearer definition of unsettling, maybe step by step?
Admire them a few times, declare interest. Make sure they are interested in coming to your club after you declare interest cause you dont want to piss them off.
After that keep sending bids, and if they try to renegotiate it to a high price. Offer a price that you want but put it on Not-Negotiable, they will probably reject it. Thats usually how the players get unsettled, at least for me.
Source: Unsettling Players - Football Manager 2011 - Neoseeker Forums