how do them linespeople see so good

[luvforty]

they have the best view point..... but still, not easy to pick up balls at such speed.

maybe we can learn something.

some people make terrible calls.... (not talking about cheating).

[slowfox]

Wonder what their training program is like.

[NLBwell]

Video simulators?

[sureshs]

Hawk Eye sees better

[rk_sports]

IMO they focus their eyes on the line and see if the ball comes into that zone...
don't think that strategy will work for us players are we need to track the ball for the speed/bounce

[woodrow1029]

The way to do it is:

Watch the point with some head movement. You can't just focus on the line nonstop. If you want to understand why, just try staring at one precise spot for several seconds, and it can get blurry, eyes get tired, etc.

When the player hits the ball and you know it will be threatening your line, move your eyes to the line where you think it will land. The key is to get your eyes to the line before the ball. That way, your hea won't be moving (which is why parents, players, spectators, coaches). If your head is moving, you will probably miss it. I you get there late, you will probably see it as the ball is coming up instead of landing.

Summary

Watch point
Use some head movement (not just eye movement)
Go to line when your line is threatened
Get to the line before the ball
See the ball
Call the ball in/out.

[sureshs]

How important is it to track a little bit of the trajectory of the ball just before it lands, to get the bigger picture?

[woodrow1029]

You track the point until the ball is threatening your line. You have to track some of the trajectory off the racket so you know where on the line to focus. But you need to get your eyes to the line before the ball gets to the line, or you're gonna see it late or miss it.

Most incorrect line calls in which the ball is incorrectly called out are the result of tracking or getting there late.