A week ago, on Saturday, my racquet felt fine, but the following Sunday it felt significantly worse. Today, it felt far worse, and I was playing pretty badly. I couldn't really control my shots or put enough spin on the ball to keep it in. Anyways, my question is: Could the string really lose that much tension for me to play much worse, or was it all my fault? My strings: X-one Biphase 17 mains Red Code 17 crosses The strings aren't frayed at all and I've only played with them three times, so I don't really want to cut them out.