Arsenal boss Mikel Arteta says Gabriel Magalhaes and William Saliba will be key tomorrow at Liverpool.
Arteta is delighted with the form of his defensive pairing.
He said, "I think they clicked straight away and that is something as a coach you really hope for. When you talk about partnerships those two positions are key.
"There is a chemistry and an understanding, they complement each other in a great way and everyone has a clear role which is accepted. They are getting better and better but they are still super young for the position they play but they can still get better.
"We are going to have to suffer. In every game you have to suffer and how you go through these moments together. How you overcome those moments is a big thing. Last year we went through those moments in the second half and we had some difficulties to get over them.
"They extended for a period that was too long and you have to be able to turn those moments around and come back to the state of the game that you want."