Just a few days ago I purchased the New Balance CT 1200's. I play every day for at least 2 hours, and play competitively. I am a big guy, and I was wondering if anyone has had trouble with the air bubble popping in the back. I know I have only had them for a few days but when I had the Nike Air Zoom Vapor Speed's they popped. So please please please, if you have purchased these, let me know!