It just comes down to your definition of World Class, some will agree with you and some like myself have a different definition of what it means to be world class. I dont think he is because:
He doesnt turn up enough in the big games and win them enough for us like the very top players do. To be clear Im not saying he NEVER has, but the very top players do it consistently in the biggest games.
And by turning up, I dont mean him scoring a goal - that is a bonus if he does. I mean dictating the play/tempo for us which is primarily what he is there to do for us and what he does well a lot of the time. But when the going gets tough, where is he? How often when we are up against it does he take the game by the scruff of the neck like world class players do and say 'Im a WC player here, Im going to do something about this'.
Could easily be summed up this season by the fanfare his cameo against Aston Villa created, when he came on and started dictating things to an extent. Next game, against Emirates Marketing Project where was he then? Yes the whole team was poor, but if he is WC that is irrelevant - you rise above and drag your team with you. Like say Ronaldo does with Portugal as one example. Even against Arsenal, yes he scored but as someone posted in the match thread when our backs were against the wall something along the lines of 'when things are going like this, this isnt the game for Eriksen.' Which kind of sums it all up really.
But that is just what my expectations of a World Class player are, yours are different and thats fine. I love Eriksen and really do rate him, just stop short of calling him World Class. But I do find the labelling a player WC as a bit of a pointless debate as noone ever agrees on what WC actually is
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