Sabalenka looked to be in control of the match, but after many mistakes, the world number one lost the match 1–2 in sets, 3–6, 7–5, 6–0.
Sjnaider will face Poland's Maja Chwalinska in the semifinals on Thursday.
Honestly, I'm speechless. I'm very happy. I'm just trying to focus on taking point after point and not thinking about the result. She (Sabalenka) is number one in the world, so I just tried to do my best, says Diana Sjnaider after the triumph.
In the second semi-final, which will also be played on Thursday, Ukrainian Marta Kostjuk will face Mirra Andrejeva of Russia.
