I'm 15 years old, been playing for about a year or so. I'm still playing with my first and only racquet, which is like a $39.99 Wilson; didn't want to buy a $189.99 racquet, play for a month and then decide that I didn't really like tennis. That would have been a huge waste of money, so I just bought the Wilson US Open Racquet. I'm looking to buy a better racquet, the Wilson [K] Four 105. Wilson US Open Racquet: Headsize: 110" Oversize Length: 27.5" Composition: Titanium/Graphite Weight: 10 oz Wilson [K] Four 105: Headsize: 105" Length: 27.25" Weight: 9.9 oz My question is this; because the [K] Four has a smaller headsize and shorter length, would it affect my playing in a negative way? Is the 105" that much different from the 110" headsize? Thanks a bunch everyone!