The current British number 10 says her back has been holding up well since January although she had an epidural injection in March and accepts she may need further pain-killing treatment in the future.
Murray had been accused of being a "drama queen" by former tennis star Virginia Wade after receiving lengthy on-court treatment during an earlier match against Jarkko Nieminen, but revealed he had refused pain-killing injections to counter the back pain he has been suffering since the start of this year.