Fulham boss Marco Silva reflected on a difficult afternoon in SW6, as Fulham were beaten 3-0 by West London rivals Brentford.
"At the Cottage in a derby, as we know, and our first game of the season at home as well, it's always really tough when you lose the way we lost the game.
"Brentford deserved the three points and we have to keep going, keep working hard because we have a long way to go and big room to improve because many things didn't work this afternoon."
"We tried to start strong and we had our moments like Brentford. They had their moments as well but not many chances one side or the other.
"Really balanced, tight. We knew before the match, in this type of game sometimes it's going to be the detail that makes the difference and this afternoon it was the detail."
The visitors broke the deadlock with one minute left of the first half, and extended their lead from penalty spot following a foul that saw Tim Ream receive a second yellow.
And as the Whites committed men forward with their numerical disadvantage, they were caught on the break in the dying embers and fell further behind.
"We tried to adjust something without changing players at half-time. Good reaction, I have to say beginning of the second half. We hit the crossbar, a possible moment to change the game.
"When we were preparing a change from the bench to have a reaction with Tom Cairney and Willian, came the penalty and the second yellow card. That made a huge impact on the game.
"To play with ten men until the end of the match was really tough for us, from a clear and obvious mistake from the referee in my opinion. After that was much more difficult.
"Tim doesn't understand why (he was sent off), no-one told him why. We don't understand as well. From the bench, it's impossible to see. What I saw was the reaction from our players. They were very surprised."
Raul Jimenez made his home Premier League debut for Fulham, and Marco was asked about the Mexican's performance.
"The season before we arrived in this football club, [Aleksandar Mitrovic] scored four goals in the Premier League. Half of that season he was on the bench. The season after, he scored 43 goals. Last season, in 24 games, he scored 14 goals. What we did with him, now we have to do with the players that we have in our squad.
"This is football. We have to work with Raúl like we worked with (Carlos) Vinicius last season."