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.
Finals
Singles
- Clara Tauson defeated Jeļena Ostapenko, 6–3, 4–6, 6–4
Doubles
- Greet Minnen / Alison Van Uytvanck defeated Erin Routliffe / Kimberley Zimmermann 6–3, 6–3
Points and prize money
Prize money
| Event | W | F | SF | QF | Round of 16 | Round of 321 | Q2 | Q1 |
| Singles | €23,548 | €13,224 | €8,145 | €4,676 | €2,990 | €2,450 | €1,575 | €1,024 |
| Doubles * | €8,306 | €4,838 | €3,064 | €1,854 | €1,412 |
1 Qualifiers prize money is also the Round of 32 prize money
* per team
Singles main draw entrants
Seeds
Other entrants
The following players received wildcards into the main draw:The following players received entry from the qualifying draw:
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'''
Doubles main draw entrants
Seeds
- Rankings are as of August 30, 2021.
Other entrants
The following pairs received wildcards into the doubles main draw:The following pair received entry using a protected ranking:
Withdrawals
;Before the tournament- Mona Barthel / Kaitlyn Christian → replaced by Kaitlyn Christian / Anna Karolína Schmiedlová