2021 BGL Luxembourg Open

The 2021 BGL BNP Paribas Luxembourg Open was a professional women's tennis tournament played on indoor hard courts sponsored by BNP Paribas. It was the 25th edition of the Luxembourg Open, and part of the WTA 250 tournaments category of the 2021 WTA Tour. It was held in Kockelscheuer, Luxembourg from 13 to 19 September 2021.

Singles

 * Clara Tauson def. Jeļena Ostapenko, 6–3, 4–6, 6–4

Doubles

 * 🇧🇪 Greet Minnen / 🇧🇪 Alison Van Uytvanck def. 🇳🇿 Erin Routliffe / 🇧🇪 Kimberley Zimmermann 6–3, 6–3

Prize money
1 Qualifiers prize money is also the Round of 32 prize money
 * per team

Seeds

 * Rankings are as of August 30, 2021.

Other entrants
The following players received wildcards into the main draw:
 * 🇩🇪 Anna-Lena Friedsam
 * 🇱🇺 Mandy Minella
 * Stefanie Vögele

The following players received entry from the qualifying draw:
 * Jana Fett
 * Arianne Hartono
 * 🇷🇺 Ekaterina Makarova
 * 🇩🇪 Jule Niemeier
 * 🇺🇦 Lesia Tsurenko
 * 🇷🇺 Anastasia Zakharova

Withdrawals

 * Before the tournament
 * 🇫🇷 Clara Burel → replaced by 🇫🇷 Océane Dodin
 * 🇩🇪 Andrea Petkovic → replaced by 🇦🇺 Astra Sharma
 * 🇨🇿 Kateřina Siniaková → replaced by 🇧🇾 Aliaksandra Sasnovich
 * 🇷🇸 Nina Stojanović → replaced by  Clara Tauson

Seeds

 * Rankings are as of August 30, 2021.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇩🇪 Anna-Lena Friedsam / 🇩🇪 Lena Papadakis
 * 🇱🇺 Mandy Minella / 🇷🇺 Liudmila Samsonova

The following pair received entry using a protected ranking:
 * 🇷🇺 Vitalia Diatchenko / 🇷🇺 Yana Sizikova

Withdrawals

 * Before the tournament
 * 🇩🇪 Mona Barthel / 🇺🇸 Kaitlyn Christian → replaced by 🇺🇸 Kaitlyn Christian / 🇸🇰 Anna Karolína Schmiedlová