Andy Murray will decide on Saturday morning whether he is fit enough to return to the ATP Tour at Queen's Club next week.
The former world number one, 31, played some practice sets with fellow Briton Cameron Norrie on Friday and was due to decide afterwards whether to play.
But he has put back that decision, before the draw taking place at midday.
The Scot, who has not played since Wimbledon last year, had a hip operation in January.
Queen's, which starts on Monday, is set to have the strongest line-up in its 128-year history with 15 of the world's top 30 taking part.
World number four and French Open semi-finalist Juan Martin del Potro withdrew from the competition on Friday after receiving medical advice to rest.
Murray, who was forced to pull out of this week's Libema Open in the Netherlands, still hopes to play at Wimbledon, which starts on 2 July.
But last week, his mother Judy told BBC Sport that Murray would not risk playing at Wimbledon unless he was fully fit.
"The most important thing is he gets fit again for the long term and any top athlete would tell you they would not come back until they felt they could give 100%, especially in a major like Wimbledon," she said.
Meanwhile, Britons Dan Evans and Jay Clarke have been awarded wildcards into the main draw at Queen's.
Evans has won 15 of his 18 matches since returning from a drugs ban in April, while Clarke reached the quarter-finals of June's ATP Challenger event in Nottingham.
And so the long-running drama of when Murray might return stretches into at least another day.
The series began in New York in August, and was on location in Brisbane in January before returning closer to home.
Murray has been back on the practice court for barely a fortnight. If he is still unsure whether he is ready, then perhaps he should hold fire for now.
But he is clearly desperate to return, and although rusty in his two practice sets with Cameron Norrie, moved much better than in the exhibition match he played in Abu Dhabi shortly before his surgery.
Murray appeared a little cautious when bending for some low bouncing balls, but after losing the first set (which was played in front of reporters) 6-3, he is said to have won the second 7-5.
A decision is now expected before Saturday's draw, which takes place at 12:00 BST.