The Dumfries development is part of ongoing efforts to improve access to the sport across Scotland, with indoor centres recently built in Edinburgh and Elgin.
However, it has not been able to meet original hopes of opening before the end of 2025.
“The tennis centre is at the final stage before opening and we would expect it to be open within the next few weeks,” a council statement said.
“The operational agreement between DGC and Queen of the South FC is under review by the respective legal teams.
“Once this is fully agreed, the tennis centre will open as soon as is practical to allow community groups, tennis clubs and schools in to use the facility.”
It added: “All parties want people to be playing tennis in there as soon as possible and enjoying the fantastic facility.”