I remember speaking to an ATP Tournament Director prior to the changes in the doubles rules and he hated the idea that he was mandated to provide a doubles draw and allocate a certain % of the tournament's total prize money to doubles when they were usually the least attended matches and the top players did not play. The tournaments depend on making money not only from ticket sales but from concessions. During a typical night session at an ATP event there would be a featured singles match followed by a doubles match. More than 1/2 the crowd would leave after the singles match finished meaning less concession sales. This Director would have rathered done away with the doubles and have a larger singles draw or more prize money in the singles to attract more marquee singles players. And he was not alone, many other TD's felt the same--which is why the changes came about. Let's face it, with very few exceptions most of the so-called 'doubles specialists' are just players not good enough to make it in singles. Most fans who attend a tournament do so based on who is in the singles draw, not who is in the doubles draw. The changes in the doubles have kept the pro doubles game from extinction. Since the rules changes more of top singles players like Federer, Nadal, Roddick, etc, have competed in doubles. And let's face it again, fans would rather see Federer and anyone play against Nadal and anyone or Roddick and anyone than see doubles specialists who's names they don't recongize. I'd wager most fans would have a very difficult time naming the top 5 ranked doubles teams in the world. With the new rules the duration of doubles matches is more predictable so now often doubles matches are played before the featured singles matches during night sessions which means more fans are attending doubles matches than before. Again, had it not been for the new rules the pro doubles game might be gone. With the success of the new rules in the ATP the WTA has since adopted the new rules as well. The Grand Slams, which are governed by the ITF and not the ATP or WTA still play regular scoring in doubles. I can tell you that many of the doubles specialists are very content with the new rules. They are able to play for the same prize money by spending less time on court.