Porto goalkeeper Iker Casillas says he drew no extra satisfaction from getting one over Jose Mourinho by beating Chelsea 2-1 in Tuesday's Champions League Group G clash.
Casillas and Mourinho had three turbulent seasons together at Real Madrid from 2010 to 2013, with the long-serving Blancos captain being dropped by the Portuguese coach amid a series of disagreements behind the scenes.
The pair were reunited when Mourinho headed to the Estadio do Dragao to face his former club on Tuesday, and goals from midfielder Andre Andre and defender Maicon saw Porto come away with a surprise win.
Casillas, who has won four and drawn one of his five meetings with teams managed by Mourinho over the course of his career, said he had moved on from any past issues with the Chelsea boss and that they had shaken hands on Tuesday.
"I'm not happy with having beaten Mourinho -- I'm happy for winning with my team," Casillas told "Champions Total."
"I shook hands with Mourinho. That is what gentlemen do. A long time has passed. I don't live in the past."
Casillas -- who broke the record for Champions League appearances on Tuesday -- made fine saves to deny fellow Spain internationals Pedro Rodriguez and Cesc Fabregas but accepted responsibility for the Willian free kick that had briefly drawn Chelsea level.
"I could have done more," he said. "It was difficult to see the ball as it moved, but it is my responsibility. Fortunately, the team went on to get the win."
Chelsea striker Diego Costa, meanwhile, blamed a lack of focus for the defeat in Portugal.
"We had the game under control. We knew it was going to be a physical game," Costa said. "We began well. Things changed when they scored, but we quickly equalised. In the second half the same thing happened -- we were lacking concentration at key moments of the game."
The loss at Porto was only the latest setback in a poor start to the season for the reigning English champions, who currently sit 14th in the Premier League with just eight points from their first seven games.
Costa added: "To come out of this we need to be all together, and for everyone to give a little more. We are not playing well, this is not a good moment, but we have players to get out of this easily."