One thing to pay attention to is the throat area of the racket on the inside of the frame will bleed the string color or default white if you don't shade the intended color fully (i know because i used to try to make rackets for my own personal use for the game.. and they were terrible lol). I attached a photo of the in-game view and also one from the actual racket... you'll see that the inside throat is actually black.
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the difference is in the two photos attached. you'll see how the racket you created has white at the bottom of the head of the racket on the inside where the strings and the bottom of the racket meet. In the actual photo of the racket that area is black. You need to make the black painted part bigger and more defined where it is currently white.