Hopefully Mane's demands are less than Salah's, I hope we keep him, I did read somewhere Mane had put off talks until the summer to concentrate on playing. He has shown he can do a very good job at the CF also, so gives us that flexibility, especially if he starts to slow down, he has always been a strong powerful forward.
I think some of FSG strategy is to let contracts run down so, we put them on higher wages for a shorter time, like, if we would have doubled Salah & Mane money a year ago (what it will probably take to keep them), that means we are paying an extra year on the larger salary.
We are also in a stronger position now, as we have Jota & Diaz already in doing well, so we are not under the same pressure to sign Salah & Mane as we have quality alternatives.