SABR | The most powerful technique in tennis history, perfected by Roger Federer

SABR is one of the advanced techniques in tennis.
SABR was developed and perfected by the emperor of tennis, Roger Federer.
Even professional tennis players find it difficult to use this technique freely.
Currently, only Rafael Nadal, Novak Djokovic and Nick Kyrgios are considered to have mastered it.
So, in what situations should you use this technique and how can you increase your chances of success? to increase your chances of success.
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