Fc Porto vs Fc Chelsea

(Originally on BBC.sport)

Chelsea striker Diego Costa is available for Tuesday's match in Porto because his domestic three-match ban does not extend to European games.
 

Blues manager Jose Mourinho, who oversaw the Portuguese club's Champions League victory in 2004, has no new injury worries for the Group G match.
 

Porto midfielder Yacine Brahimi hurt his right knee against Moreirense on Friday, but is in the squad.

Midfielders Hector Herrera and Silvestre Varela have been left out.
 

The Blues began their group campaign with a 4-0 win over Maccabi Tel Aviv,although they are a lowly 15th in the Premier League after seven games.

Porto coach Julen Lopetegui, a former Barcelona and Rayo Vallecano goalkeeper, said he has not factored in Chelsea's domestic form.

"They have kicked off by winning 4-0 and that says how they are going to hang on to this competition, which is the most important at a club level," he said.

"That they started their own league better or worse has no impact. They are great team with great potential at every level."
 

'No more questions on Casillas'

On Tuesday, Mourinho faces goalkeeper Iker Casillas, whom he managed at Real Madrid. The Spain international, 34, was dropped by the Portuguese for a league game towards the end of 2012, and then spent much of the rest of the season on the bench. The relationship between the two reportedly became strained.

When asked about encountering his former player, the Blues boss told the pre-match news conference: "If you're going to ask me about Casillas, I'm going to greet him at the beginning and the end. No more questions about it."
 

On his team's opponents, who are leading the Portuguese league, Mourinho said: "Away games in the Champions League are always difficult. They are a big side and want to win, but Porto know they will not face a weak team.