An agreement has now been reached with the extras, which could ultimately reach £39m, having the potential to make the package the club’s highest outlay on a player.
It would surpass the £35m purchase of Andy Carroll in January 2011.
The Egypt international departed Cairo on Tuesday and preparations are in place for his physical assessment to be carried out on Merseyside as soon as it is feasible.
If there are no hindrances, his signing should be made official by June 22 on a five-year deal with a salary in the region of £90,000 a week.
The versatile attacker will join Dominic Solanke as an incomer ahead of 2017-18, with the Under-20 World Cup winner swapping Chelsea for Liverpool.
The talented teenager will officially link up with the Reds on July 1 following the expiration of his terms at Stamford Bridge.
A tribunal is expected to decide the training compensation Antonio Conte’s side will receive for the 19-year-old, with the clubs still a distance apart in their valuations.