The German prefers hammering consistent backhands from the back, so Fery cannot let him find a steady rhythm.
Deploying drop shots immediately after the serve could prove highly effective.
Even if the tactic fails occasionally, the constant threat will introduce doubt into Zverev's mind, as the 29-year-old is less comfortable at the net.
Zverev enters with immense confidence after his first Grand Slam title.
In his quarter-final victory against Taylor Fritz, he made 77% of first serves and won over 70% of points on both serves.
Fery must use his block return to insert himself into points. Whenever a rare break-point opportunity arises, the Briton must capitalize immediately.
The home crowd will firmly support Fery, only the sixth British man to reach this stage in the Open era.
Getting spectators engaged early is vital, especially since Fery has logged four more hours on court than Zverev.
"I've been trying to use the crowd to my advantage in important moments, just to add a little pressure maybe to the opponents," Fery said after defeating Cobolli.
>>> FBI, FAA Investigate Drone Strike on LAPD Helicopter in Tarzana
"I'll try and do that again at moments that feel right on Friday."
