I don't know either if the ring has a special meaning, sorry.
I don't know him very well, I'm a new fan too (I started following him after Roland-Garros last year).
Actually, Adam (adee_gee) is the biggest Mathieu fan because he launched the Montcourtmania! And he got this forum for us. I'm just a "bandwagon jumper".
Do you speak French, since you're Italian? The girl who writes this blog: http://mathieumontcourt.skyblog.com/
knows him, you can try to ask your questions there.