Brentford boss Thomas Frank was left frustrated after their 3-2 defeat to Tottenham.
Frank felt they paid for a lack of concentration in a key moment of the game.
He said: "Except for the 10-minute black-out, we played a very good game. We frustrated them with the high press, we were good with the low block, on the break and transition we were very dangerous.
"Then we had a black-out, so it is about being smarter. The second goal is the most disappointing, don't concede from the kick off. But we recovered, I thought we had chances to score even more.
"I think we have good players, we do a lot of things right. It does not seem like this season it is dropping the right way, but we have to keep fighting."
On Brentford's league position, he added: "I'm not worried. We just beat Forest with a good performance, we lost today with a better performance."