Last season, the 28-year-old's campaign extended through to Spain's European Championship victory on July 14, along with City teammates Kyle Walker and Phil Foden, who finished runners-up with England at the tournament in Germany.
City defender Manuel Akanji half-joked recently that he may have to retire at 30 because of the gruelling schedule.
"It's so tough," the Swiss player said. "You don't just think about this season -- but also next season. Let's say we win the league or cup, then go to the final of the Club World Cup; the Community Shield is three weeks after. So when do we have holidays?"
City host Inter Milan in a repeat of the 2023 Champions League final, won by the English side as part of their first-ever treble. It is one of eight first-phase games, followed by a potential playoff before the last 16 kicks off.
City manager Pep Guardiola said his tactics for the new format will be to simply "win our first game, then the next one, then we will see."
City forward Erling Haaland could overtake Cristiano Ronaldo as the fastest player to reach 100 goals for a single club, having scored 99 goals in 103 appearances in all competitions -- including nine in four league games this season.
Ronaldo netted 100 in 105 matches for Real Madrid.
"I played for 11 years and scored 11 goals. This guy (Haaland), in four games he's scored nine," Guardiola said with a laugh.
"The opponents will find a solution (to contain the Norwegian), and we have to find a solution to beat them, to find a way."
Rodri said Haaland's blistering start to the season is a great example of the importance of rest. The striker had much of the summer off as Norway did not qualify for Euro 2024.
The new 32-team Club World Cup in the United States, meanwhile, ends on July 13, about a month before the next Premier League campaign kicks off, which will then lead into the 2026 World Cup.