He seems to have barely won a match overseas. I recall sitting there in Homebush watching him clean up Kukishkin very very easily and thinking he would have a stand out year. If anything I think he has gone backwards.
He's got the 2nd season wobbles.
1st season you have no fear, no ranking, nothing to lose, then it all gets so serious...
You have built up expectations, have ranking points to defend, are conscious of your opponents ranking compared to yours, and the you build pressure on yourself.
He will get over it and learn to play accordingly.