Mainz had gone ahead in the 71st minute when centre - half Leon Balogun volleyed home from just inside the penalty area .
Mainz had beaten Italian side Lazio 3 - 0 in an earlier friendly .
Mainz , who had beaten Italian side Lazio 3 - 0 in an earlier friendly , had gone ahead in the 71st minute when centre - half Leon Balogun volleyed home from just inside the penalty area .