An adjustement of rules of tennis game
A game must be won by the serving player within a given time - say 4 minutes - or the game automaticaly goes to the recieving player. From the other side, recieving player has to completely follow the rhythm of the server and can not in any way influence his serving, including the amount of time that passes between the two serves.
Grand Slam Season as of 2008:
Right word in the right moment - a glass of watter in the desert.