Here's how NOT to do it... (but still keep peace on the court....)
doubles play amongst friends (one guy acts like he really doesn't care about winning, but everyone knows he really does - we'll call him Jerry).
They are serving, Jerry is at the net in front of me, I am returning serve on deuce side. Hard serve comes to me, I am late on my forehand and hit a medium paced return shoulder high to Jerry's FH side at the net. Jerry reflex volleys and tries to hit the alley, but clearly hits it out. As soon as it hits out, Jerry proclaims with disgust "the serve was out". I look at my partner, look back at Jerry, again he proclaims "the serve was out".
The serve was close, may very well've been slightly out, but I played it in good faith and my partner did not call it out. Point should've counted as played.
Jerry announces, "2nd serve" to his partner.
On the change over I said to his partner "that was our point". He said "I know...."
Really didn't want to get in a p i ss ing match with Jerry, so no big deal, but it was kinda funny in a shake your head way.... tho I would've taken the point in a tournament or league play. Jerry has never played league, so there are a number of infractions he would be called on I'd think, but again, social play.... shake head and move on.