The Spanish midfielder arrived last month from Athletic Bilbao.
"He has to adapt to his new surroundings a bit. The Spanish league is different to the Bundesliga," Neuer stated to Spox.
"That's why people cannot expect too much from him right away. He will do a good job eventually, though.
"He's a very open guy and the good thing is that he speaks English pretty well for a Spaniard.
"Will his hefty price tag weigh down on him? You don't think about money when you step on to the pitch."