ATP Shanghai, China
"That will be fun": Ben Shelton to face Jannik Sinner for second year running in Shanghai R16
After winning their duel here last year, the American has dropped three successive meetings to the now world No. 1.
The 36-year-old former world No. 9 last won a title in 2022 before this week in Antwerp, where he beat three seeds.
Lehecka is less than 100 points away from breaking back into the Top 30.
The Czech erased all five break points he faced to eliminate the 2019 title holder, 7-6 (2), 6-4, late Wednesday.