Nick Kyrgios says he only slept for one hour because of the excitement of learning he had reached his first Grand Slam singles final after Rafael Nadal's withdrawal at Wimbledon.
"I had a shocking sleep, just with the excitement," the world number 40 said.
"I had so much anxiety, I was already feeling so nervous, and I don't feel nervous usually."
Spain's Nadal, 36, pulled out on Thursday with an abdominal injury.
The pair were due to play at the All England Club on Friday, but 22-time Grand Slam champion Nadal announced he was unable to play because of a tear in his abdominal muscle.