<Li> (very rarely) immediate award of the point to the server . </Li> <P> A good serve occurs when a legally delivered ball lands in the cross-court service box or on any line bounding it without touching anything in flight . </P> <P> A let occurs when a legally delivered ball lands in the cross-court service box having touched the net cord (but not the net post or any other object). Play stops immediately, and the server is allowed another attempt . The umpire (or opposing player when there is no umpire) will usually say "let" or "net" to signal to the server a let has occurred . Lets occur more often on first serves, as the server is more cautious on the success of a second serve . </P> <P> There are multiple reasons why a service attempt may result in a fault . </P>

When do you get a second serve in tennis