How does he rep-ay his coach? By sacking him.
Obviously, his old coach was stunned.
Damien Inocencio said:
"(It's) irrational. He told me when he got back from holidays on Wednesday. He has done the grand slam this year and he has the world record in his legs. I find it sad."
I guess if you are trying to support him - you could say 'at least he's not being complacent.'