"I know Ronaldo well, he is my friend who I play with him in the national team, and I see Cristiano, Nani and Anderson who I played with in Portugal too while at Porto," said Bosingwa.
"In the world, at this moment, it is between Cristiano and Lionel Messi for me. He is an intelligent player and fast, a very good player to have on your team.
"It is very important because we need to win this game, we need three points at the moment, and this is always an important game in the season, like a 'derby'.
"When Chelsea play, we play to win the game, but if we draw away in Manchester it is not bad.
"It is a good game to play in, and is a good motivation for all the players. It is maybe the biggest in England, and we have similar in Portugal, with Benfica, Porto and Sporting Lisbon, those three teams are the best in Portugal."