'You can't believe how bad it was,' the nine-time Grand Slam winner told reporters.
Tennis champion survived horrific 1996 school shooting.
The prime minister speaks of knighthood as the champion loses some sleep.
Scotsman's victory sets off a United Kingdom celebration.
With crowd solidly behind him, Scotsman advances to semifinal against Jerzy Janowicz.
Murray raises the possibility and Williams says "that would be fine." Now it just needs to happen.
Back injury flared up during the Italian Open last week.