Arsenal suffered a major injury blow on Monday after Mikel Arteta confirmed winger Bukayo Saka will be sidelined for "many weeks" with a torn hamstring.
Sources have told ESPN that the 23-year-old was told the news after seeing a specialist, having left the stadium on crutches following the Gunners' 5-1 win at Crystal Palace last weekend.
"It's not looking good," Areta said. "He's going to be out for many weeks. I cannot be too specific because I don't know, but it will be many weeks.
"It's a huge [blow].