He said the MLS expansion franchise is selling more than 100 season tickets a day since Saturday.

Evidence of the interest could be seen on Saturday when more than 12,000 people attended the game at Finley Stadium. The walk-up crowd exceeded 7,000, which Eales estimated was mostly Atlanta United fans.

The 40,000 sales for the opener has exceeded the soft cap that the team planned as the soccer-configuration capacity for Mercedes-Benz Stadium. MLS average attendance last season was slightly more than 21,692.

Eales said season-tickets will be distributed later this week. The package will include the season-ticket card, a lanyard and commemorative box.

Eales said marketing will increase the home opener. Those efforts will include billboards and wraps on MARTA trains, busses and bus stops.

Other Atlanta United stories posted on Tuesday:

Explore English duo contributing to Atlanta United

Explore Atlanta United player twitter handles

Explore Daily Atlanta United video update

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Web: On the Atlanta United channel on AJC.com.

Facebook: On our Facebook page at Atlanta United News Now .

Twitter: Follow Doug Roberson on twitter @DougRobersonAJC.