It was clear out. Where did hawk-eye see touch of the line here
It was not only a mark problem but the 3D trajectory was clearly not reconstituted correctly.If u watch a tennis ball hit in slow motion u will see two things happen, it will go out of round and it will wobble, hawke-eye does not see that but still puts the mark down as an oval, looking at this pic you can easily see that if the mark was round it would be well out.
Not to mention most people who are now calling it out only saw it was out in the replay.Ofc it's not 100%. Nothing in motion measurement is 100%, d-oh! What matters is whether it's right 99% of the time (low margin of error). If so, then hawk-eye's cool, because man-eye makes errors a lot more often. Human perception is very very unreliable.
My initial impression was that it was out, which remained the same after watching the replay. But, after seeing the gif and your ss I am almost certain hawk-eye was correct. The skid is very misleading indeed.The ball will skid quite a bit, where the ball is when it starts coming back up off the grass is not where it first contacted the grass. The gif is a bit deceiving in that way. It's tough to tell if it did clip the line or not. I took a few screencaps of the gif. The best I got was this one
Is the ball touching the grass at that point? It's still over/on the line there, and if it's not touching then it's pretty damn close.
hawkeye is not perfect but it's never way off, it looks like it could be wrong here but it's not some massive error, I can't tell if it clipped by watching it so I'm not going to bitch about hawkeye getting it wrong if it did which I can't tell if it did.