The agency has developed a direct mail, outdoor and local press campaign that will break in February and run until Wimbledon starts in June. Exact targeting of the DM has yet to be decided.
The work will promote the Surbiton Trophy, DFS Classic, Hastings Direct International Championships and Nottingham Open, which all suffer from poor attendance.
Under the banner 'Tennis Nation', the campaign will feature the strapline 'Live tennis. Be this close to the action'.
23red managing partner Jane Asscher said the idea behind the campaign was to "bring tennis to life" and demonstrate the appeal of attending live matches.
"There are tournaments on our doorstep and we have the opportunity to get really close to the action," she said. "This is a tremendous opportunity to reinvigorate the game."
LTA handed 23red the business following a two-way pitch. At the conclusion of Wimbledon, the agency hopes to be involved in the LTA's development of its schools and corporate programme.
The LTA recently hired Branded to encourage teenagers to participate in tennis and identify why young people lose interest in the sport in their teens. The work is part of a campaign to raise the popularity of tennis as a whole.
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