Seriously, sauropods were slow, weren't they? And if Velociraptors could climb trees, why couldn't they climb a startled sauropod? Note that the bigger sauros would be the most vulnerable due to speed differential. If you were a large sauropod and I had those claws, I could run up your shoulder and be on the back of that skinny neck before you could get your tail untangled.
In case you ever reincarnate as herbivorous dinosaur, just hit wildly with legs, tail and neck. These conveniently stuck Velociraptors will be crushed in seconds.
I have serious doubts that something as small as _Velociraptor_ could even break a sauropod's skin. Do caracals hunt elephants?
This is where the cutting edge of said claw would come into play best.
Imagine a cat trying to climb a cow and kill it. Improbable, isn't it?
Pack of meerkats can be fierce. But they typically hunt animals much smaller than their size.
In contrast, Velociraptor has adaptations contradictory to modern big predatory mammals (ones that hunt animals bigger than themselves). Big claw is not supported by thick leg bones needed to withstand forces when fighting prey. Modern big cats and polar bears have much thicker legs and jaws. Velociraptor has thin bones and elongated skull - not suitable for wrestling. Head facing forward makes no sense in animal confronting prey much higher than itself. Legs are shortened which is not a good adaptation for fast running or jumping. Extremely long tail would be very vulnerable to breaking or indeed, biting by prey.
If that kitty cat had claws the size of a Velociraptor, I wouldn't want it stalking me. Ever get a Maine Coon Cat mad at you? Bad Plan! (If you are not aware of Maine Coon Cats, do a google search and be surprised). Attitude accounts for a lot more than physical ability sometimes.