Arsenal boss Mikel Arteta was happy seeing David Luiz celebrate a clearance in their 0-0 draw with Manchester United.
Arteta was delighted with the fight shown by his players on the day.
He said, "Yes, because you have to put your body on the line and when you have to defend your own box, you have to be ruthless and you have to be even more aggressive when you attack the opponents box because it makes a huge impact on the result, and I think everybody is defending in those situations with their lives, which is what I asked them to do.
"When that's the case, obviously you're harder to beat and you get the amount of clean sheets we're getting at the moment.
"I think the team is in a really good moment and I think we are moving in the right direction. All the players are so willing to contribute to the team and contribute to the plan that we have in place, and they seem excited, so when that's the case I have to push them inch by inch and make them believe that we can finish the season in a really strong way."
