Taylor Fritz of the United States holds a second-place trophy after losing the final match of the ATP World Tour Finals against Italy's Jannik Sinner at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns to Taylor Fritz of the United States during the final match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner sprays Angelo Binaghi, the President of the Italian Tennis Federation, after winning the final match of the ATP World Tour Finals against Taylor Fritz of the United States at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner poses with his tean after winning the final match of the ATP World Tour Finals against Taylor Fritz of the United States at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns to Taylor Fritz of the United States during the final match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Taylor Fritz of the United States returns to Italy's Jannik Sinner during the final match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Taylor Fritz of the United States reacts during the final match of the ATP World Tour Finals against Italy's Jannik Sinner at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner reacts during the final match of the ATP World Tour Finals against Taylor Fritz of the United States at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Taylor Fritz of the United States reacts during the final match of the ATP World Tour Finals against Italy's Jannik Sinner at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner holds the trophy after winning the final match of the ATP World Tour Finals against Taylor Fritz of the United States at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner reacts after winning the singles final tennis match of the ATP World Tour Finals against United States' Taylor Fritz, at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns to Taylor Fritz of the United States during the final match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Taylor Fritz of the United States reacts during the final match of the ATP World Tour Finals against Italy's Jannik Sinner at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner poses with his father Johann, mother Siglinde, and brother Mark, after winning the final match of the ATP World Tour Finals against Taylor Fritz of the United States at the Inalpi Arena, in Turin, Italy, Sunday, Nov. 17, 2024. (AP Photo/Antonio Calanni)