I agree that that angle makes it look like there was no contact. But I'm struggling to look at that still image and envisage March pulling his leg away with (at the moment that was taken) an absolutely maximum of a millimetre between them, as that appears to bear out. It would almost defy physics!
I think the still image on that article is fairly conclusive proof that Solly did make SOME contact with Trezeguet's shin (for those claiming he didn't). Still no-where near enough to cause him to tumble like he did, of course, nor enough to make it a penalty.