Roger Federer has revealed he suffered a bruised shinbone after a nightmare left him hysterical in the middle of the night.
Federer won today to reach the Japan Open semi-finals, beating Takao Suzuki in three sets, but his Tokyo experience has not been all positive.
He has revealed how he woke yesterday morning in a state of confusion, and wrote in his blog: 'The trouble started when I woke up in the middle of the night, I must have had a nightmare.
'I jumped out of bed and stood up screaming in a state of shock, I did not know where I was and I ran back and hit the corner of the bed which is solid wood and sharp.
'Luckily Mirka [Vavrinec, Federer's girlfriend] was there, she woke up because of all the noise that I made, turned on the light on, grabbed me and told me to relax.
'Apparently I screamed out loud the same thing [an expletive] as I said on court against Tursunov in Toronto.
'I have a big bruise on my tibia now. I don't know what would have happened if she hadn't been there. It was pretty scary for a moment, it's never happened to me before and hope it will never happen again.
'Mirka thinks I have been playing too much tennis this year and that is why it might have happened, but I think it might have been the sake bomber I had during the shabu-shabu dinner.'