A little-known pickleball rule is prompting questions about how far players can legally push the game’s boundaries. The issue surfaced when USA Pickleball referee Ron Ponder examined the potential grey areas in the rules in a dicussion with The Dink Pickleball. What he identified was not an act of gamesmanship or a breach of sportsmanship, but a move that is, at least for now, entirely legal. Also Read: Jack Sock Edges Past Roscoe Bellamy to Enter Men’s Singles Final at Carvana PPA MastersUnder current rules, a server is permitted to cross the plane of the net immediately after striking the serve, provided the ball has already left the paddle.