Arsenal fitness chief Darren Burgess has hailed the attitude of the players.
"I'll tell you who I really like, the two central midfielders; Lucas Torreira and Granit Xhaka," Burgess told Optus Sport.
"I love the fact that Lucas Torreira, in every single drill, takes it personally if someone gets by him. I love that in him.
"Granit Xhaka is exactly the same whether it's in the gym or on the pitch.
"Every moment counts and I reckon that separates the really good players and the top players.
"Some think they can turn it on in the game, you just can't at this level, you have to train that way and those two do it superbly."