However , after Gattuso suddenly left the club on 31 July 2016 , Merkel was released by the club on 14 August 2016 .
On 21 July 2016 Merkel joined his former Milan teammate Gennaro Gattuso , who served as manager at Pisa .
After Gennaro Gattuso suddenly left the club on 31 July 2016 , Merkel was released by the club on 14 August 2016 .
On 21 July 2016 Merkel joined his former Milan teammate Gennaro Gattuso , who served as manager at Pisa .