| Spec | Wilson Ultra 99 Pro | Yonex Percept 97D |
|---|---|---|
| Weight (unstrung) | 305g | 320g |
| Head Size | 99 sq in | 97 sq in |
| Balance | Head Light | Head Light |
| String Pattern | 16x18 | 16x19 |
| Swingweight | 330 | 340 |
| RA Stiffness | 71 | 62 |
| Strung Weight | 330g | 345g |
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