Mascherano has already seen coach Pep Guardiola lose his rag over taunts from Real rival Jose Mourinho.
The former Liverpool midfielder said: "I would like to talk a little football.
"What bothers me is that they talk too much about what surrounds the football. It is a Madrid-Barça, a historical semifinal.
"But they always divert attention to other things and to not talk about how important the football is. It is a shame."