Says Petchey in the same breath as making numerous comparisons to Roger Federer at the same age.
If he wanted to urge caution he might like to take a lead by saying things like - Dominic Hrbaty broke into the top 100 at a similar age and yet has never reached the top 10. Or he could mention a few of the many areas of his game that Andy will need to work on for him to ever get into the top 10 nevermind win a grand slam tournament.
Andy's rise is par for the course for players of his talent. Lots of players go from 350 to 50 in the world. Normally they might be 19 or 20 when it occurs but the rapid rise is fairly common. This is why his former coach mentioned the target of 50 by the end of the year.