2021 Koser Jewelers Tennis Challenge

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.

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

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]