However, Arsene Wenger has stated in his pre-match press conference that not only does he want the player to stay, but to develop into a great player.
Sanchez in particular has been the subject of intense speculation about his future amid reported interest from the big-spending duo of Manchester City and Paris Saint-Germain. "He had a scan two days ago and he's out for a while - I don't know if it two weeks or one more week, but he will not be available". He has only gone from strength-to-strength playing for the Gunners and was particularly impressive in the last season wherein he established himself as one of the best players in the Premier League.
"A lot of it depends on Sanchez but if he goes they're going to need to bring in some replacements I think".
Alexis Sanchez had supposedly previously told the club he would only consider remaining if they forked out such a high amount.
The Chile forward missed pre-season after being granted extra time off following the Confederations Cup and has been ruled out of Friday's game due to an abdominal strain.
Asked if Sanchez, who has less than a year left on his contract, could yet put pen to paper on a new deal, Wenger said: 'Always possible.
"I think he had in his career some bad moments because he had some small injuries". One or two weeks.
Wenger added: "I'm convinced in 10 or 15 years it will not necessarily be a football specialist who is a manager of a club".
"Sanchez has been focused, but when you have treatment on medical bench it is not easy".
They defeated Chelsea again when the teams renewed acquaintances at Wembley in last Sunday's Community Shield, winning a penalty shootout 4-1 after a 1-1 draw.
Wenger said: "I personally am convinced that will happen soon", with reference to Corinne Diacre, who manages second-tier French team Clermont Foot.