The 2021 Swedish Open was a tennis tournament played on outdoor clay courts as part of the ATP Tour 250 Series of the 2021 ATP Tour[1] and as part of the WTA 125K Series.

[2] It took place in Båstad, Sweden, from 12 through 18 July 2021 for the men's tournament, and from 5 through 10 July 2021 for the women's tournament.

[3] It was the 73rd edition of the event for the men and the 11th edition for the women.

*per team The following players received wildcards into the main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following players received wildcards into the main draw: The following players received entry using protected rankings: