The Brazilian started alongside John Obi Mikel in the middle as the Blues ran out 3-1 winners against the Mexican side to seal their place in the Club World Cup final.
And, despite playing the majority of his career at centre-back, the 25-year-old underlined his happiness to adapt for the club.
“Since he [Benitez] arrived he’s been talking about playing me there if the opportunity arose,” the Brazilian told Fifa.com.
“He spoke to me in the team-talk and we decided to do it for that game. I was happy with the result, about getting through to a big final, and with my performance as well.
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“I’ve been working in training every day on other aspects of my game so I can help out in different ways. They’re things we’ve been practising, and the coach has a gift for seeing when a player can make a positive contribution in a certain position.
“Getting up there in attack is not my main job. All I want to do is help the team, no matter what my position is. I love playing for Chelsea. I love playing. And I hope we can take the title.”
The Diadema-born defender went on to insist there will be no conflict of interest when he faces Brazilian side Corinthians in the tournament's final.
“It’s another final, and that’s always special for me, whoever we play," he added.
“Everyone tries to help. And when they’ve got some information to give they’ve got the freedom to come out and tell the team about it.
“We’ve been talking a lot this week about the importance that we attach to the [Club] World Cup in South America and especially in Brazil.
“I’ve always made it clear that it’s been a dream of mine to play in a [Club] World Cup and that I’d give anything to win it.”