Well yeah, one of the best players does mean we have to raise our game. Compared to the dross we face each week in the prem, he tested the defence a hell of a lot more. Fact is, over the two legs, he was effectively marshalled out of the game. He ran a bit, he got nowhere. So we doubled up, he needed it, but it worked very effectively.
Its the same with Ronaldo, he can be marshalled out of a game by a good, efficient defence. Having seen Ronaldo a hell of a lot more, i know that even when he's out of a game, he has it in him to do that one moment of genius that'll break himself free. Thats what puts him with the best playing today. Does Messi have that? If he does i'll take your word for it, because i've not seen enough this season against good defences to know.
What made Maradona and Zidane up their with the finest ever to play is even the best defence had no answer for them (well, bar 'ya mam' jokes for the latter). Nearest we had to that sort of class in recent years is a peak of his career Paul Scholes, and even Ryan Giggs. (odd to say that now were having to suffer their winding down years). 2 men who could play against 100 and still find that breakthrough, be it a perfect pass or jinxing skill