I thought I'd just post this because I went down a bit of a wormhole after seeing Zach in the main draw of the National Juniors and not really knowing anything about him. 

He seemed to be doing pretty well last season, getting to the 200s in juniors then not playing for a while (GCSEs? Injuries? Focusing on training?). 
Anyhow nice little video and interview with him. Seems like he wants to go the US College route. 

https://asmscholarships.com/athletes/jamste664/