Osmen's goal and defeated Liverpool - How did Giorgi Mamardashvili make a debut match in the Champions League?

In the second round of the Champions League, Liverpool lost 0: 1 to Galatasarais. In the first half the hosts were promoted by Osimen with a penalty. In the 56th minute, the goalkeeper Alison, who was replaced by Mamardashvili. In the rest of the time, the score has not changed and “the reds have failed. The statistical page Sofascore has made Mamardashvili out of 10 ...