Kolasinac was replaced 20 minutes from the end of the match, which Arsenal won on penalties.
Kolasinac started against Chelsea in our International Champions Cup clash on Wednesday night but picked up a knee injury midway through the second half during the 1-1 draw.
The 25-year old had to be helped off the pitch following a collision with Chelsea wing-back Victor Moses, and was due to undergo a scan to reveal the extent of the injury on Thursday.More news: Footage shows botched eyebrow job lead to wild brawl in nail salon
But the news is that the Welshman is aiming to return to training next week, and could be fit to for the opening day of the Premier League season.
Developed tightness in his right calf.
But new head coach Unai Emery confirmed on the recent pre-season tour of Singapore that the forward was close to agreeing fresh terms.More news: Women's Month: Mothers are encouraged to breastfeed regardless of HIV status
A short note on their official website regarding his health reads: "Sustained an injury to his left knee". Continues to be assessed. Will be out for 8-10 weeks.
Ainsley Maitland-Niles will also provide cover at left-back if required.
Arsenal face Lazio in Sweden on Saturday in their final pre-season friendly before getting their Premier League campaign underway next weekend with a home game against Manhester City.More news: Portland Police Disperse Crowds at Patriot Prayer Event