Look at his serve at the start of this video:
Extremely modern: great racket drop, loop toss, hits left to right, great external/internal shoulder rotation. His handicap: one foot had to remain in touch with the ground. But the basics have not changed in 100 years...
Extremely modern: great racket drop, loop toss, hits left to right, great external/internal shoulder rotation. His handicap: one foot had to remain in touch with the ground. But the basics have not changed in 100 years...
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