Dunlop force competition tennis racket junior the dunlop force competition tennis racket is available in a range of sizes to suit junior players tennis racket length 19 inch construction fused alloy head size 87 sq inch un strung weight 175g tennis racket length 21 inch construction fused alloy head size 95 sq inch un strung weight 185g tennis racket length 23 inch construction fused alloy head size 95 sq inch un strung weight 195g