Ideally you call no-ball (and stick your arm out) but in order to give the batsman time to change his stroke to take advantage of the bowler's attempt to cheat, particularly with a fast bowler, it all simply comes out as a barely comprehensible explosion of breath "NORLL".
One reason why aspiring umpires are taught to breathe in just before the ball is delivered.
In tennis I suspect the call should be as early as possible to avoid players having to stretch, and possible pull a muscle, to reach an impossible ball.
>>In tennis I suspect the call should be as early as possible to avoid players having to stretch, and possible pull a muscle, to reach an impossible ball.>>
The speed of reaction of most umpires and linesmen/women can be quite breathtaking at times, although seeking calls to be "as early as possible" is stretching it a bit in view of the speed of the shots...:-)
However, in one Wimbledon women's match last week a ball hitting the baseline at considerable pace was called out, but the umpire immediately overruled the call.
HawkEye proved the umpire to be absolutely spot on.