British Davis Cup player Dan Evans is "fully co-operating" with police over an alleged sexual assault in Bath.
Avon and Somerset police published a photo of three men as part of an appeal for more information.
The other two are also believed to be British tennis players and police say they have names for all three, who may be able to help with their enquiries.
Last month, 19-year-old Evans lost the deciding rubber in Britain's Davis Cup defeat in Lithuania.
BBC tennis correspondent Jonathan Overend said Evans' agent confirmed on Sunday he is fully co-operating with police, but has been advised not to make any further comment at this stage.
The alleged incident is reported to have taken place in the early hours of Friday 19 March.
Evans, Britain's top-ranked teenager, was beaten in the second round of a tournament in Bath that week by compatriot Josh Goodall.
Avon and Somerset police issued an appeal on their website for help in identifying three men "who may have information".
The appeal said a woman left a nightclub with a friend and they began talking with two men before one allegedly pushed her onto a discarded mattress and sexually assaulted her.
Two years ago, Evans, who is believed to be in the United States, had his funding suspended by the LTA after being caught on a late night out while still involved in the doubles event at Wimbledon.
Looking for tickets to Wimbledon 2010? Check out our website: wimbledon tennis tickets
5 April 2010 10:31 UK