He has a serous physical challenge ahead The doctors are not optimistic of his chances It may be touch and go whether he makes it Touch and go' means that the successful outcome for something is not at all certain. EX. "It's touch and go whether we will arrive at the shop before it closes." Touch and go'([危険な](https://eikaiwa.dmm.com/uknow/questions/32167/)/危なっかしい)とは[成功する](https://eikaiwa.dmm.com/