There are some interesting rule changes starting in 2021. Now you can "drop serve".
Servers must release the ball from one of the server˙s hands or dropped off the server˙s paddle face from any natural (un-aided) height and hit the ball after the ball
bounces on the playing surface. This is mainly to allow the physically challenged to more
easily serve the ball.
Second, there are no "service lets" anymore. If the ball touches the net but lands fair, the
ball is in-play. There is no second serve anymore. If the receiver yells, "Let" and does not
play the ball, it is a fault on the receiving team.
A complete list can be found at:
https://usapickleball.org/wp- content/uploads/2019/12/Updated-2021-Change-Document-FINAL.pdf
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* Origin: The Hobby Line! BBS (954:895/1)