Andy Murray has admitted there remains a possibility he could still withdraw from Wimbledon.
The twice Wimbledon champion and former world number one faces Frenchman Benoit Paire in the first round on Tuesday.
Murray is on the way back from hip surgery he underwent in January.
He has played three matches since returning to competitive action, losing against Nick Kyrgios at Queen’s then beating Stan Wawrinka in Eastbourne before losing against fellow Briton Kyle Edmund.
Asked if he could have pulled out from Wimbledon, Murray told Sportsweek on BBC Radio 5 live: “Yes, it is still possible. I am taking it literally each day. Some days I feel better than others.
“I have played three matches, which was great, the last couple of weeks against some top players and did well.
“I only started hitting balls two weeks before Queen’s, which is not particularly a long time, and quite soon into that you are competing at the highest level.
“You need to be very patient and literally take it day by day just now, and see where you are at.
“I need to kind of see how I feel every day, but in terms of winning this event, I have no belief or thoughts that that is going to happen, really.”
Reflecting on his long battle with hip trouble, Murray added: “It has been hard.
“You become a little bit more patient and understanding that if I do wake up one morning and things aren’t okay, I don’t need to go out there and kill myself for two hours on the court. I can take a day off and let things settle down and then start building from there.
“I am learning every single day, along with my team, to try to get back where I want to be.
“The main priority is my health, and I have always got to have that at the front of my mind just now.”