World No 1 Carlos Alcaraz cruised into his 11th quarterfinal of the season with a comfortable victory over Botic van de Zandschulp at the Swiss Indoors on Wednesday.
The 19-year-old saw off his 35th-ranked opponent 6-4, 6-2 to continue his bid for a sixth title of the year.
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The US Open champion edged a tight opening set and then fell an early break down in the second as Dutchman Van de Zandschulp gave himself renewed hope of a shock win.
But Alcaraz quickly stamped that out, racing to victory with a run of six straight games.