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Novak Djokovic: The ‘Iron Man’ device tennis star may wear at US Open – and what experts make of it | Science & Tech News
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Novak Djokovic has raised eyebrows at this year’s Grand Slams by revealing a mysterious metal disc strapped to his chest. The tennis star had the coin-like device taped between his pectorals at the French Open and Wimbledon, and could wear it again when the US Open starts on Monday. His first opponent is Alexandre Muller,…