The Blues legend said (via the Metro):"Got to think disappointed. Two in the box against six is disappointing to start with.
"But I think if you look at Rudiger in the build-up to that, the ball goes wide and he kind of gets sucked out into an area where he's not really going to affect it. He can pass him on.
"If you could have Rudiger just outside the six-yard box, just to stop that run across, Martial then can't make that run across and that just allows that second centre-half to go touch-tight and be more aggressive with him."
Asked if a knock to Christensen impacted him stopping Martial, Terry added: "Quite possibly. Listen it's good movement, it's a great ball into the box and a great header.
"But can he more aggressive? Yeah, ideally I'd like to see that from him. Does this [the bloody nose] affect him? Clearly because he goes off and he's kind of holding it seconds before Wan-Bissaka gets his cross into the box.
"But I was just saying to the lads, they're ones where you want to get up and not even go off the pitch, just stay on the pitch with a little bit of blood running down your face and get on with it."