Jannik Sinner extended his remarkable run with a 7-5 7-6 (7-4) win over Alex Michelsen at the Miami Open.
The Italian world number two claimed his 25th and 26th successes in straight sets at ATP Masters 1000 events during his win over Corentin Moutet on Monday – setting a new record.
Sinner duly made it 27 but, having taken the first set 7-5, he was 5-2 down in the second before coming back to win on a tie-break.
The four-time Grand Slam winner has triumphed at the past two Masters 1000 tournaments – at Indian Wells earlier this month and Paris in November – without losing a set.
In the women’s draw, third seed Elena Rybakina ended Talia Gibson’s run with a comprehensive 6-2 6-2 win to move into the last eight.
The 21-year-old Australian had won 11 of her last 12 matches but was outclassed by two-time Grand Slam champion Rybakina, who will now face fifth seed Jessica Pegula on Wednesday.
Coco Gauff takes on Belinda Bencic in a quarter-final later on Tuesday, while Karolina Muchova was the first to power into the semis with a 7-5 7-6 (7-5) win against Canada’s Victoria Mboko.