It will break, or at least crack. If you sit the sponge on a tea towel and then use the tea towel as your rolling aid - pulling up and over firmly but gently - that will help, but otherwise don't fret - make a good job of the icing and no one will know.
I made a yule log today and rolled it but it broke on the first roll and the second... I managed to save it but how do i roll it so it doesn't break. I was rolling it on paper. I have to make one for a raffle next week and i want it to look brilliant