TURIN: Defending champion Jannik Sinner sealed a semi-final spot at the ATP Finals with a 6-4, 6-3 victory over Alexander Zverev before his home fans.

Sinner extended his winning streak on indoor hard courts to 28 matches — stretching back to his loss to Novak Djokovic in the final of this event two years ago.

It was Sinner's fifth straight victory over Zverev — a run that includes this year's Australian Open final and recent meetings in Vienna and Paris.

The second-ranked Sinner still has a chance to finish the year at No 1. But he needs to win the tournament and hope that Carlos Alcaraz doesn't win another match.

Sinner leads the Bjorn Borg group with two wins, while Zverev and Felix Auger-Aliassime have one win each. Ben Shelton trails without a victory.

Alcaraz has also won his o

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