Andy Murray is not "100% sure" he will play at a fifth Olympics for Great Britain despite his selection for the Paris Games on Sunday, while 2021 US Open winner Emma Raducanu has turned down the chance to be on the team.
Murray was named alongside Jack Draper, Cam Norrie and Dan Evans in men's singles, and he was nominated for a place in doubles alongside Evans.
"It depends a little bit physically how I am doing," Murray said Sunday. "How the next few weeks go as well. Yeah, my plan just now is to play, but it is not straightforward.
"I'll find out in the next 10 days or so on the doubles and what's going to happen there. Hopefully me and Evo get the chance to play."
Katie Boulter is the sole Great Britain representative in the women's singles. Tokyo 2020 Olympians Neal Skupski and Joe Salisbury will compete in men's doubles, with other pairings across both men's and women's doubles to be confirmed by the end of June.
"It's a huge privilege to once again announce our tennis players for Team GB," Team GB chef de mission Mark England said. "The calibre of the team gets stronger with every Games, and it is great to see a mix of returning and first-time Olympians."
Murray, who in February signaled his intention to retire later this year, has been granted an International Tennis Federation place to compete in the singles event of the Olympic tennis tournament due to being a former Grand Slam winner and Olympic gold medalist in 2012 and '16.
Murray, who also won the silver medal in mixed doubles alongside Laura Robson at London 2012, has previously said he doesn't plan to play on much beyond this summer.
Raducanu, who recently returned from a lengthy injury absence, turned down the chance to compete in Paris because of the multiple changes in surface over the coming weeks.
The Olympics tournament will be played at Roland Garros and on clay.
"I think she feels it is not the right time for her," Iain Bates, head of Team GB's tennis team, said Sunday. "A lot of that is the late notice for the spot, also the surface change from grass, clay and hard. Everyone is aware of her history and that places greater stress on her. Also an element of where her ranking is and getting to the U.S. and pushing back her ranking."
The Associated Press contributed to this report.