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Carlos Alcaraz took a medical timeout after hurting his foot in an injury scare at the Japan Open in Tokyo.
Alcaraz pulled up mid-point in the fifth game of his first-round match against Sebastian Baez.
After taking several hobbled steps, Alcaraz fell to his back and covered his face with his hands.
The World No 1 and US Open champion received medical attention and called a timeout following the injury.
Alcaraz received some black strapping on his left ankle but continued to play on.
The Spaniard played in the Laver Cup in San Francisco last weekend, his first tournament since winning his sixth grand slam title in New York.
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