The arsenal player Lacazette who is aged 28 years, did not make any movements for the friendly match with Lyon in the last match due to the injury sustained
Now the player is to face a race against time to be ready to play on Tyneside on Sunday when the Gunners’ Premier League campaign kicks off.
The France international did not travel to Spain as part of the 21-man squad due to injury - and our head coach explained Alex's absence in his post-match press conference.
However, Emery had some confirmations in his speech in the press confereence.
"Hopefully he could be available for the match against Newcastle," Emery said. "The doctors, they are optimistic. We are going to wait. The next days are going to be very important to see how he is going to progress with his injury.
"But I am really, really happy with other players also. If he is ready for Sunday, perfect. If he isn't, then for the next.
"We need now to have a very competitive team, with the players ready forth next matches but above all to create a mentality to start strong and find our best performance in the next match."
The attitude given to make the buying of Nicolas Pepe was also left at home for the visit to the Nou Camp following his £72million switch from Lille.
The Ivory Coast star, 24, has been training with his new side but only recently returned from Africa Cup of Nations duty and is likely to start on the bench against Toon.
Mesut Ozil and Sead Kolasinac were involved though for the first time since their car-jacking hell, with the former starting and the heroic Bosnian coming on at half-time.