Britain's Andy Murray says he is fighting to be fit for Wimbledon because he wants "a bit of closure" at the All England Club before retiring later this year.
The two-time champion, 37, does not plan to play much past the summer and his preparations for a Wimbledon farewell have been dented by a back issue, which required surgery.
Murray says he will decide on "Monday evening" whether he will play in the singles.
The world number 115 is due to play Tomas Machac of the Czech Republic on Tuesday.
"I don't think there's one thing that I'm hoping for.