In a warm London with temperatures that touch the 30 degrees, Jannik Sinner trained in the field number 2 of Aorrangi Park with Caleb Simms, an English player that tennis players call to Wimbledon to warm up in view of their games and to get in rhythm. Last year Simms also warmed Novak Djokovic, who will face the number one in the world today. The blue wore the sleeve by precaution, but it had no problem in managing the blows
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