Influential Mendes is due in Manchester this week, seeking a new £140,000-a-week contract for De Gea, 24.
That £7.28million-a-year deal would make De Gea the highest-paid goalkeeper in the world.
The sticking point, though, is believed to be the buy-out clause, with United valuing their world-class keeper at £50m.
But Mendes, mindful of the fact that Real Madrid are eyeing De Gea, wants the release figure to be £35m.
It’s understandable that the Reds wouldn’t want to part with De Gea, for less than we paid for Juan Mata while despite having little time for him, I can also see why Mendes is keen to milk Real Madrid for as much money as possible should they make a move for his client.