Why? He's generally been poor.
He probably had higher stats because most of their play was coming down his side, his only saving grace was they took Salah off. I wonder how many of these tackles and clearances were after he was subbed? He might have been playing out of position but it doesn't change the fact that even playing his correct position, he's not very good.
Yes, exactly. This kind of use of statistics is very simplistic.
That said, I personally thought that Martina did okay. I thought at the time he was at fault for their goal, but looking at it again I'm not sure if Salah doesn't just plain push him over.