kyrgios and kokkinakis are both huge prospects for Australia and they push eachother immensely. Healthy competition between the two has made them both better and right now Kyrgios is pushing ahead a bit, but Australia has quite a few 18-21 year old future stars that push eachother. Wish the same could be said about US players. All we have in the 18-21 range is Jack Sock, and he has no one to push him and puts in less than average work into his game. As a US tennis fan, as bad as things look, I wish I could take solace in knowing good prospects were on the way, but thats just not the case. We have a few promising 16 year olds, (Kozlov, Mmoh, Tiafoe) but it will be a few years before we'll know if either of them will be good pro players. Going back to what was predicted in 2007, Donald Young was supposed to have a couple of majors by now, and Ryan Harrison, the youngest tennis player to win an ATP tour match since Nadal ( age 15 ) was supposed to be top 10 by now.
Sorry I went off topic, but yeah your Aussie guys are looking good, and if Tomic gets his attitude/daddy issues/girlfriend issues in check, he'll be a slam threat again soon. Perfect timing as Hewitt winds down his career.