Does a racquet get old? 15 year old Daughter plays 5-6 days a week plus tournaments. Each of her 4 racquets has been strung at least 12 times each and are rotated evenly. Racquet is a you tek radical mp. I ask bc she cracked one recently and I strung an old one and a new one the same way and she preffered the new one but did not know which was which. Old one was about 12 months old. So my question do frames fatigue? Thanks for any thoughts.