A product of FSV Frankurt's youth academy, Sliskovic made his professional debut at the age of 19 in the Bundesliga with FSV Mainz and played for the club for five seasons, until 2015.
It was confirmed on Wednesday that Mane's glittering six-year spell on Merseyside has come to an end, with the forward swapping Anfield for the Allianz Arena.
The fresh terms come hot on the heels of a sensational 2021/22 campaign from the attacking midfielder, who registered 20 league goals and 13 assists en route to being voted as Bundesliga Player of the Season.
The 30-year-old made 77 appearances over the past two seasons for PSV Eindhoven, where he won the Dutch Super Cup in 2021 and the KNVB Cup in 2022, registering 18 goals and 18 assists.
The reigning UEFA Europa League winner hosts the current Bundesliga Champion when the 60th season of the Bundesliga begins with Eintracht Frankfurt and Bayern Munich.
Gravenberch is from footballing stock. His parents played amateur football, while older brother Danzell currently plies his trade in the Dutch second tier with De Graafschap.