The Chilean did finally return on Tuesday, however, and was pictured joking around with manager Arsene Wenger at the club's London Colney training ground.
ARSENE WENGER concedes Arsenal could never dream of competing with Paris Saint-Germain for the world-record signing of Neymar, admitting "once a country owns a club, everything is possible".
Speaking over the weekend, Wenger had said he would have to check on Sanchez's fitness before deciding whether to include the former Barcelona star against Chelsea. I wanted first him to come back, he is coming out of a fracture.
"There's no development on his future", he explained. "He's staying, of course".
He continued: "With Sanchez out of the team, that would weaken Arsenal".
Wilshere has less than a year left on his current deal and Wenger admits he must have a hard discussion with the player over where his future lies.
Bernardo Silva would 'love' Mbappe at Man City
It is flawless to have someone like him when you're a midfield player because he is very fast, very clever, and a good finisher. Manchester City playmaker Bernardo Silva has urged his new side to splash the cash to bring in Kylian Mbappe from Monaco .
"I am sorry I am still here and I can understand that you want to kill me but, at the moment, I survive".
The Gunners missed out on Champions League football after finishing fifth last season, but Jose Mourinho's United side - who finished sixth - qualified for the elite competition after lifting the 2016-17 Europa League trophy.
'I think he will be here for this season.
Seven points the difference between the league champions Chelsea and second placed Tottenham Hotspurs last season, where we saw the title decided two weeks prior to the season's conclusion. "I think the performance on the day does not depend on the length of the contract, if that was true we would sign everyone for 20 years and be happy".
"If you look at it, it's always in your interests, even if you have a short contract, to do well". And the kind of character he is. Though he has not featured for the club during pre-season he is being considered for the clash with Premier League champions Chelsea in the traditional curtain-raiser ahead of the new domestic campaign.