Italy's Jannik Sinner celebrates after winning the singles tennis match of the ATP World Tour Finals against United States' Taylor Fritz, at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner reacts during the singles tennis match of the ATP World Tour Finals against United States' Taylor Fritz, at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns the ball to United States' Taylor Fritz during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns the ball to United States' Taylor Fritz during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Italy's Jannik Sinner returns the ball to United States' Taylor Fritz during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Russia's Daniil Medvedev Australia's Alex de Minaur returns the ball to Russia's Daniil Medvedev Australia's Alex de Minaur during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Russia's Daniil Medvedev returns the ball to Australia's Alex de Minaur during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
United States' Taylor Fritz reacts during the singles tennis match of the ATP World Tour Finals against Italy's Jannik Sinner, at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
United States' Taylor Fritz returns the ball to Italy's Jannik Sinner during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Russia's Daniil Medvedev Australia's Alex de Minaur returns the ball to Russia's Daniil Medvedev Australia's Alex de Minaur during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Russia's Daniil Medvedev returns the ball to Australia's Alex de Minaur during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Australia's Alex de Minaur returns the ball to Russia's Daniil Medvedev during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)
Russia's Daniil Medvedev returns the ball to Australia's Alex de Minaur during their singles tennis match of the ATP World Tour Finals at the Inalpi Arena, in Turin, Italy, Tuesday, Nov. 12, 2024. (AP Photo/Antonio Calanni)