Thursday 17 November 2016 22:43, UK
Arsene Wenger is hopeful Arsenal forward Alexis Sanchez will be fit to take part in Saturday's showdown with Manchester United, live on Sky Sports.
But first Wenger will assess the player - and watch the video of his display for Chile against Uruguay on Tuesday.
Despite the fact he was reportedly carrying a hamstring injury, Sanchez started the World Cup Qualifier and scored twice in a 3-1 victory.
Wenger does not believe he looked like a player who was struggling in that match and the 27-year-old forward will be back at Arsenal's training base on Friday.
"I have watched the goals and he looked very sharp," said Wenger at his Thursday press briefing.
"I will watch the game. I know him so well, like all my players that I observe every day, so I will be able to see if he was playing with a restriction or not.
"But the first goal he scored, he ran from the halfway line. If you are really injured with a hamstring you cannot do that."
Sanchez has a history of trying to play through the pain barrier and Wenger says he will ask his player for an honest assessment of the injury.
"He is always OK!" said the manager. "It is a very difficult one because I am sure he will come back saying he is all right.
"He texted us to tell us he's in good shape after the game. He came off after 84 minutes and now we have to wait. I see him tomorrow morning and then I will see if he can be involved in the squad or not.
"What I will consider is the risk of injury, because he played while recovering from a hamstring injury.
"I'll consider the way he feels as well. On that front you depend on the honesty of the player, how they feel and how they recover."