"How many today, João? Thirty thousand?"
"They said forty on the radio. Fifty, even. Everyone will want to be there."
Two metro stops from the Maracanã and there is an energy in the train carriage that cannot merely be put down to it being game day. The Fluminense fans are out in more force than usual ahead of the battle of the Tricolores against Gremio.
Indeed, it's not just any match, for there is to be a special guest; a royal visit in footballing terms. Ronaldinho is making his debut for Flu.
Read my dispatch from Rio on the ESPN website.