Andre Agassi admitted he remains unsure of his plans for the future after losing to Roger Federer in the final of the US Open on Sunday.
The 35-year-old has been repeatedly asked about his retirement plans and could not confirm he will be back in New York for next year's US Open.
"I'm unsure about what I'm going to do in a month, let alone a year from now," he said after the final.
"As of now, my intention is to keep working and keep doing what I do."
The American withdrew from Wimbledon this year battling a back problem that requires cortisone injections but said there were many factors to consider.
"If I felt like it wasn't fun, if I felt like I was compromising my family too much, if I felt like physically I just couldn't come out here with the hope of making the best play the best ... ," he said.
"I don't know all the pieces that will be a part of it. When I know, you'll know."
Agassi paid the ultimate tribute to Federer after suffering his eighth straight defeat to the Swiss.
"He's the best I've ever played against," said the American.
"There are other guys you play, and I've played a lot of them, so many years, there's a safety zone, a place to get to, something to focus on.
"But anything you try to do he potentially has an answer for. It's just a question of when he starts pulling the trigger to get you to change that decision."
And Agassi could not hide the emotion after completing his 20th consecutive US Open.
"I realised after 20 years I've come full circle," he said. "I've grown up out here.
"To be here at an age where I can take in that sort of love, and be at an age where I can embrace it is a tremendous feeling. I'll never forget this."