There was something the Norway manager Stale Solbakken recently told Sportsmail about his country's superstar, Erling Haaland, that stuck in the mind.
'His body is still improving, he is still growing,' Solbakken said. 'If you look at him now and 12 months ago, you can see a small difference. He takes this very seriously.'
The end product of that is serious numbers — Haaland heads back to Borussia Dortmund tonight with five Champions League goals for Manchester City and 17 in the Premier League.
His father, Alfie, has said the striker is more professional than ever, and sources at Dortmund say he has for a while been completely dedicated to not only refining his ability but his physique, too.