Speaking to The Mirror, Argentine forward Messi has said that while Real Madrid and Bayern Munich also have the potential to beat Barcelona, Pep Guardiola's team are more likely to knock out the Catalan club.
"Manchester City are one of the strongest teams around, as well as Paris Saint-Germain," the 30-year-old said. "I also do not exclude Real Madrid in terms of quality and experience, even though they have not yet achieved the expected results.
"Then there's Bayern Munich, another great team who will play until the end. Today, however, the best are City and PSG."
Liverpool and Tottenham Hotspur also resume Champions League action this week, facing Porto and Juventus respectively.