Quinn Vandecasteele (born September 1, 2002) is an American tennis player. Vandecasteele has a career high ATP singles ranking of No. 438 achieved on August 31, 2026 and a career high ATP doubles ranking of No. 578 achieved on November 10, 2025.
Vandecasteele played college tennis at Oregon.
Career Vandecasteele won his maiden ATP Challenger doubles title at the 2025 Knoxville Challenger.
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