Swansea winger Routledge studying games of Ronaldo, Messi
He told The Sun: "They are the world's top forwards and I try to take their mentality into my own game.
"It doesn't matter if they're praised or criticised... they are always there to perform.
"Take Ronaldo's late winner against City. Had he not kept going and worked a position for that shot, nothing would have happened.
"But he did and came up with the winner. That's why he cost £80million."