Jannik Sinner was on song with a Vienna waltz over beleaguered opponent Daniel Altmaier at the Erste Bank Open to maintain his year-end No 1 hopes.

Sinner wasted little time in soaring past Germany's Altmaier 6-0 6-2 to record his quickest victory of 2025.

The top seed and 2023 Vienna champion overwhelmed Altmaier, racing to the finish in just 58 minutes.

Sinner, who was forced to retire from the third round of his Shanghai title defence earlier this month, also extended his winning streak on indoor hard courts to 17 matches.

"I feel like in the first set everything was working very well," said Sinner.

"On indoor courts, you have to be very careful. If your opponent starts to serve well, it's very difficult to break. But I'm very happy about today's performance, starting the tournamen

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