フェデラー vs ジョコビッチ Forehand - Slow-Motion
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投稿者:tennisonevideoさん
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再生時間:00:18
Sample of Tennisone.com's Pro Comparison technology-pros shown in side-by-side slow-motion. You can also compare your strokes to these pros by uploading to TennisOne.com TennisOne Video Network wing.