"We need one process with them, but in this process, they also need to show us their [development]".
"When a player comes back like Koscielny, after a big injury... a big injury can give the player hard moments", the Arsenal head coach said.
The Gunners have a defensive crisis ahead of Sunday's trip to Southampton with Rob Holding injured, Shkodran Mustafi struggling with a hamstring problem and Sokratis Papastathopoulos suspended. Emery was similarly pleased with his return, saying: "Today is another step for him and for us". We are going to decide after tomorrow, because it will be the first time Koscielny can play. He played with a very big personality for the 90 minutes, and with sometimes a good performance.
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We're pretty much aiming for the exact same moisture content, and we're hoping for the exact same pace and bounce". We are not alien to pitches like these and this is nothing new for us. "And there are no favourites".
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Wijnaldum, who has proved an invaluable cog in the Reds' midfield this season, has warned his colleagues not to underestimate United .
"Not every action was good for us, but his personality is very important to continue in the second half trying to do one-on-ones and break lines with his quality". So we will decided, but first we think about the game tomorrow.
A goal from Alexandre Lacazette, set-up by the returning Mesut Ozil, was enough to guarantee the victory which ensured Emery's side topped their Europa League group, but it was Saka's dazzling performance on the wing which caught the eye.
It remains to be seen how quickly the 33-year-old Koscielny can get back to his best after almost seven months on the sidelines, while Konstantinos Mavropanos, 21, is still out with a troublesome groin injury and hasn't played all season.
"You can improve, you can play better if you have players who can help you on the pitch". Every supporter and player from Arsenal is happy.
"This process with him is to take confidence again, take rhythm for playing matches like today", he added.