Christensen insists Chelsea remain very much in contention for a Champions League spot next term.
"They started the second half a lot quicker and a lot better than we did," the Dane said.
"We created some chances ourselves, but they took their opportunities.
"We're still in the top four. We're still fighting for that. We go into every game confident to win it. There's no change there. We're still feeling very confident and that it's in our hands."