Chelsea youngster Izzy Brown completed a loan move to Brighton & Hove Albion on Tuesday.
Hernandez completed a move from Bayer Leverkusen on Monday, with the striker entering the final year of his contract.
The game, to be played on Sept. 3, has been arranged in conjunction with the Lowery family and the Bradley Lowery Foundation.
Manchester United's Romelu Lukaku insists he must score goals in the Champions League to be considered one of the best in the world.
Braydon Bent and his dad begin their Man City trip in America by meeting an amateur team in Las Vegas who all support City.
The once-capped Spain international has suffered from a persistent ankle problem which limited him to only 12 starts for Real Oviedo last season.