Xue Song ought to know that giving your opponent who has fallen behind you towards the finishing line half-a-chance and he would sense it and immediately come charging back. Playing it safe, avoiding mistakes and hoping for your opponent to make unforced errors under pressure to catch up is not the best strategy, it's usually counter-productive and likely to backfire. Besides, at 18-16 up, XS should remind himself he still has 3 more pts to go and must never let up one bit; even if he's holding matchpoint(s), the final point is always the hardest to win as many seasoned players would attest to it. In terms of skills, these two up-and-comers are about even, little separates them. XS's defeat this time I'd attribute partly to his relative lack of experience. It'll be quite some time before we see them cross swords again, the more so when XS's international appearance continues to be rather limited.