To me it looked like a good sliding tackle, where he kicked the ball away, and then they collided. Jonjo jumped in studs showing and with a stamping motion which was quite a bit worse than Skrtel's tackle. Skrtel then kicked out and could have been sent off for that. You do know that tackling is still allowed? And yes, it shouldn't have mattered because we should be able to defend a freekick from there.