Borussia Dortmund coach Edin Terzic was left frustrated after defeat at Champions League opponents Chelsea.
The 2-0 defeat sees Chelsea reach the quarterfinals 2-1 on aggregate.
Terzic said: "It's a tough result to accept; we're very disappointed.
"They were two very tight games. In the second half we produced a very dominant performances and created a lot of chances in the end, though, it wasn't enough.
"We have to say, over the course of two games, Chelsea deserve to go through. But we would have deserved to go through too as it was two games that were very evenly matched."