For victory against Arsenal, with skipper Cesar Azpilicueta returning to the side, there was a new partner to the right of Christensen, while Trevoh Chalobah, Thiago Silva and Kurt Zouma were all unused substitutes. Such a wealth of riches at the disposal of Thomas Tuchel offers plenty of selection dilemmas but also a healthy competition that the players are thriving from.
"Trevoh deserved to start with the way he's been playing in the Super Cup and against Crystal Palace," Christensen told the club's website. "He's pushing all of us to do better.
"We have Thiago and Kurt as well so everyone is working hard. It's only the start of the season so it's still a tough moment, especially because we've all had only a short holiday.
"It's difficult to get going but the team has looked good and sharp, with everyone trying to push each other."
Christensen also said: "We just know it so well. Even the new players who have come in are familiar with it and the team is just feeling comfortable.
"We feel like we can play our game no matter in that system so it suits us well."