It's not the mouth thing. He has never been quick but he looks really leggy right now. When on top of his game he is much sharper in closing down the opposition. Also his touches seem lazier, lay offs looser.
He is not a machine you know. He has played non stop for nearly two years now with hardly a 3 week break last summer. He has played as a lone striker in all this time and for probably the most physically demanding managers at club level. Surely Harry is allowed to be at least mentally tired if not physically?
Or what are you trying to say that he is perfectly fine and everuone should ignore any potential tiredness just because in reality it's just his gaping mouth that makes him appear tired?
This sounds rather familiar to what some were saying about him at the beginning of the season during his dry spell - that he was looking leggy/tired and we should have another CF signed and playing instead... He then finished the season as top scorer
Seems like a narrative is being spun about Kane looking tired so we can moan about the same things as back then, rather than it actually being the case imo