The museum, which is situated next door to Wimbledon's centre court, has turned to local agency Grasshopper PR to run a year-long programme to raise its profile as a tourist destination.
Wimbledon-based Grasshopper won the contract after a non-competitive pitch with a remit to raise awareness of the museum and its attractions and reinforce the message that it is open year-round and not just during the annual tennis tournament, which concludes this weekend.
WLTM commercial manager Ashley Jones said: 'We have always felt that museum news gets a little swamped by the Championship news and this is a chance to change that.'
The museum is celebrating its 25th anniversary and has introduced a number of new attractions, including an art gallery, audio-visual theatre and behind-the-scenes tours.
Jones said: 'While we have done a bit of marketing, advance bookings have not been as high as they should be and we feel PR is a cost-effective way to promote the attraction.'
Grasshopper will target schools and day-trippers in the UK, alongside overseas tourists - which make up 75 per cent of the museum's visitor numbers.
Jones said in domestic terms, the campaign will focus on the south-east of England, in particular Kent and Essex.
Grasshopper will also work to reach the corporate audience in a bid to raise the museum's profile as an events venue.
The museum's recently opened art gallery and theatre double up as corporate venues with a capacity for around 200 people.
Grasshopper director Sarah Francis heads a team of four on the brief, reporting to Jones.
WLTM features a collection of memorabilia, photos and art depicting the history of lawn tennis, alongside outfits worn by tennis stars such as Venus Williams.