El Dude said:
herios, do you see his upside as being something like Almagro or Feliciano Lopez? Top 10-20 guys at their best?
El Dude, I think it is too early to assess his career best at this moment. He had played too little at ATP main tour level, his record is 7-8 wins-losses, all matches this year except an encounter with Paire from 2011 which he lost.
In many cases, a future top 20 player has lukewarm years after a big jump through the rankings. That is mainly because they need to adjust and get used to play in the big league, unless they are exceptional talents, it will take more time to work their way towards the top.
I checked both Almagro and Lopez how they managed to climb the ladder in years.
Almagro for example had a similar big jump, he went pro in 2003 going from:
737 to 156, at 18y of age.
Next few years were not as great:
finished 2004 ranked 103
2005 ranked 114.
Then comes another significant jump ending 2006 ranked 32 and gets stuck once again ending 2007 ranked 28.
In 2008 breaks into the top 20, being ion tour by then for 6 years. He is more or less steady ever since with periodic drops and a peak in 2012 when he was ranked as high as 9 for one week.
Lopez experienced in comparison a much slower development, spending many years outside of the top 100, albeit he went pro earlier at 16y.
Pablo Carreno-Busta started his pro tour later than both of them at 20 and most of the year when he was 21 was out due to injury (surgery). He my catch up but that remains to be seen.