The 27-year-old Arsenal forward has not travelled for his national side’s World Cup qualifier against Colombia on Thursday having sustained the problem in training.
However, Sanchez, who was originally thought to have sustained a minor thigh injury, could yet feature against Uruguay next Tuesday.
Wenger is concerned that Chile may risk exacerbating the hamstring problem by playing Sanchez through the pain barrier, and is now keen for his player to be assessed by Arsenal’s medical team as soon as possible.
“I got a text last night (to say) that he has a hamstring injury,” he told beIN Sports. “The team from Chile has travelled without him and they kept him to try and get him fit to play Uruguay for the second game on Tuesday night.
“I believe that with a hamstring injury. We have to get access for our medical staff to the MRI scan to see what grade it is, how bad it is and make absolutely sure they don’t make any suicidal decision that could harm his future for two or three months.
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