The official account of book "Team Brian" posted new interview of Brian given after WC.
https://twitter.com/TeamBrian2018/status/1111211623585177601
"Yuzuru got injured in November, and it was mid January he returned to the real ice training. Yuzu made great recovery after that. We can not upgrade the practice with him being on physiotherapy and rehabilitation at the same time. We observed his condition carefully, and continued to train with lots of concentration and enthusiasm.
He could hardly practice 4Lo in the Olympic season. Before CoR in this season, he really focused on training 4Lo and somehow wanted to land it in the place of Moscow. He had that accumulation of those training, and that was why he landed 4Lo in the practice of mid March. And I was very glad that he arrived in Japan and landed good 4Lo in the first practice.
In SP of WC, he doubled 4S but I had no worry in FS. Once Yuzu makes mistake, he thinks over and over again and fix it, and always recovers. He failed in SP, which means if he can fix the problem, he will succeed in FS. So I was watching his 4S with confidence.
Although the treatment of Yuzu's injury had been going well, he worked his foot very hard in this competition, he will resume training in off season after resting his body properly.
I know well what kind of strategy Nathan had to gain more points this far. This is what Yuzu did when he was chasing Patrick Chan in the past. Yuzu was far behind (from Chan) in the area of skating skills, edge work and basics, and there was the time he couldn't win even though he executed the same jump (as Chan's). Then he caught up with him by brushing up his skating skills. Now Nathan is like that, he has been polishing his skating skills. As a result, PCS gap between Yuzu's and Nathan's got narrowed. However, Yuzu understands this kind of strategy well. What we should develop, and what we should do to get some more points, we will work on that from now on.
With Yuzu, we are going to discuss strategically the points to get scores and will improve in the next season. It is possible to recapture the championship."
According to the interviewer, Brian looked very positive and talked willingly.