By Matt Hardy Manchester City manager Pep Guardiola has insisted that it’s “back to business” for the defending champions as they take on a “starving and hungry” Copenhagen, who have not played a competitive match in two months, in the Champions League Round of 16 tomorrow. City face their Danish opposition knowing Copenhagen pose dangers that aided in Manchester United’s exit from the Champions League group stages earlier this year. Guardiola’s side are looking to win consecutive titles after they beat Inter Milan for the club’s first title last year in Istanbul. They’re one of just two Engli…