"But the problem with coaching is that it is a full-time job. By that I mean for at least 40 weeks in a year you have to be with the player, either travelling or training. Right now I don't want to do that"

This quote by Richard Krajicek talks to the problem of training as a permanent job. He mentions that for 40 weeks out of the year, a train must be with the player, either travelling or training. This indicates that a train must be offered to the player for a big portion of the year, and also this can be a difficult dedication to make. Krajicek is likely talking from personal experience, as he is currently not a train and also does not want to handle the responsibility of being a full-time trainer. This quote speaks with the commitment and also dedication that is called for to be an effective instructor, as well as the fact that it is not a job that every person wants to tackle.