Belinda Bencic defeated Nastasja Schunk 6–4, 6–2 in the first round of the WTA 250 Stuttgart tournament on clay on 19 April 2021. As the clear pre-match favourite with odds of 1.17, Bencic delivered a commanding performance to justify her status, dispatching the German qualifier in straight sets. The Swiss player's superior ranking and experience proved decisive on the red clay, where she controlled proceedings throughout. Schunk, operating at odds of 5.64, offered limited resistance in a one-sided encounter that saw Bencic advance smoothly to the second round.