Casemiro reckons he is playing at the peak of his powers and is relishing leading Brazil's push for a sixth World Cup triumph.
The Manchester United midfielder scored a wonder goal to clinch a 1-0 win over Switzerland, which booked Brazil's place in the last 16. Casemiro won five Champions League titles at Real Madrid, but believes he is currently in the best form of his glittering career - because of his maturity.
"I think it’s down to my age," said Casemiro. "I’m 30-years-old. When you reach a certain age, you reach your prime mentality and physically. I think at 30 and 31 you’re at your prime. So, without doubt, I’m really happy.