[jakemessi]

most of the young players have changed to play with speed -glue -substitute -rubbers.
There are also blades which have a rebound effekt. this means that they are slower in passive play and faster in topspin- or other fast-play. For example the german company andro produces such rubbers. many talented jung players try the new rubbers . But i think that the pros. will use tuner such as STiga booster and Tibhar CTE and keep their old rubbers because it is more similar to the old feeling if you keep the same rubber ,so they do not have to change their technics.
not all of the substitude rubbers are of good quality !