The regional tennis centre has been constructed within the existing King George V sports complex.
The new indoor courts will be open to clubs, schools and individual players of all ages and will also host tournaments.
The organisations which financed the development hope it will elevate the sport to a new level and open up opportunities to potentially develop future stars of the game.
The bulk of the funding came from the Transforming Scottish Indoor Tennis fund, operated by the LTA, LTA Tennis Foundation, sportscotland and Tennis Scotland.
Contributions from Dumfries and Galloway Council and the Holywood Trust completed the funding package.