Kyrgios with a 24-5 Challenger record now.
That's ridiculously good.
An almost 5:1 ratio(4.8:1), which is good. But to put it in perspective I looked up figures for Nadal. (and this is not about Nadal, just that he is current #1. Could have used Federer, Djokovic etc, but for eg used Nadal as he is current No1.)
In ATP World Tour Masters 1000 matches Nadal is 281:54
In Grand Slams, Nadal is 184:24.
Interestingly, his overall career figures are 699:136
The point here is to have this record at challenger level is good, but not ridiculoulsy good when you consider that there are players with better records at tour level playing the top opponents. Kyrgios is still developing and himself could go on to an even better record at tour level over time, but lets not overhype him on results so far. Overhyping players rarely helps their careers!
(As an aside it was interesting to see Grand Slam stats can be better than 1000 stats, but when you consider the bigger field at slams so higher average ranking of opponent at 1000 events and the fact that easy first round matches in 1000s can become byes instead of helping your win/loss it makes sense.)