“After the Olympics I was very upset,” Son said.
“I was really down because I play for my country and want to get some medals for my country. For six months I was preparing but after Olympics I thought now I have to focus on the season.
“It was not easy but everyone, my family, my team-mates, help me a lot and that made me stronger than before.
“I had pre-season and I feel really fit. We played maybe four games at the Olympics so I feel very fit.
“It is true I am in great form and have made a great start but I have to keep working hard so I finish like this.”