The Egypt international scored 13 goals in 15 appearances for for relegated Mainz last season.
Zidan will join Hamburg for 5 million euros and will be unveiled byt the club on Sunday.
The 25-year-old completed a medical at Hamburg last week.
The Egypt international scored 13 goals in 15 appearances for for relegated Mainz last season.
Zidan will join Hamburg for 5 million euros and will be unveiled byt the club on Sunday.
The 25-year-old completed a medical at Hamburg last week.
