The 2021 Koser Jewelers Tennis Challenge was a professional women's tennis tournament played on outdoor hard courts. It was the fourteenth edition of the tournament which was part of the 2021 ITF Women's World Tennis Tour. It took place in Landisville, Pennsylvania, United States between 9 and 15 August 2021.
Points and prize money
Point distribution
Prize money
Singles main-draw entrants
Seeds
1 Rankings are as of 2 August 2021.
Other entrants
The following players received wildcards into the singles main draw: Alexa Glatch Danielle Lao Jamie Loeb Grace Min
The following player received entry using a protected ranking: Vitalia Diatchenko
The following players received entry from the qualifying draw: Ekaterine Gorgodze Beatriz Haddad Maia Mayo Hibi Mai Hontama Emma Raducanu Ankita Raina Daria Snigur Aldila Sutjiadi
The following player received entry as a Lucky loser: Sophie Chang
Champions
Singles
Nuria Párrizas Díaz def. Greet Minnen, 7–6(8–6), 4–6, 7–6(9–7)
Doubles
Hanna Chang / Alexa Glatch def. Samantha Murray Sharan / Valeria Savinykh, 7–6(7–3), 3–6, [11–9]