Andy Murray says he "feels good" as he prepares to defend his Olympic tennis title in Tokyo, but admits there is anxiety among the team over Covid-19.
The Briton won back-to-back gold medals at London 2012 and Rio 2016 but has twice required hip surgery since and is currently ranked 104th in the world.
Murray will open against ninth-seeded Canadian Felix Auger-Aliassime.
"I've prepared as best as I can. I have tough draws in singles and doubles but I think I have a chance," he said.
Speaking to BBC sports editor Dan Roan, Murray added: "If I can get through a round or two I'll start to feel more comfortable.