Andy Murray will seek medical guidance on the Zika virus before travelling to Rio for the Olympics.
The 29-year-old defending champion said he had been influenced by recent reports of scientists saying it was "unethical" for the summer Olympics and Paralympics to go ahead.
"I will speak to a couple of doctors about it and see what their advice is," he told BBC Radio 5 live.
"I plan on playing for sure but don't know the exact situation there now."
He added: "I need to get a little bit more information first before making a decision.