Jannik Sinner successfully defended his title at the ATP Finals by defeating Carlos Alcaraz 7-6(4), 7-5.He achieved his 10th consecutive win at the ATP Finals without dropping a set, boosting his total indoor hard court wins to 31.Sinner credited his success to his team, including head coach Simone Vagnozzi, assistant coach Darren Cahill, and athletic trainer Umberto Ferrara.