Spartak Moscow goalkeeper Sergei Pesyakov is a doubt for Tuesday’s crucial Champions League clash against Benfica due to a foot injury sustained in the team's 2-1 league defeat to Anzhi, the club reported Sunday.

Pesyakov is Spartak's No . 2 stopper after Andriy Dikan, who is out with a shoulder knock.

It may mean a rare outing for third-choice goalkeeper Artyom Rebrov in Tuesday's match at Luzhniki Stadium.

“We suspect a second metatarsal bone fracture,” Spartak’s doctor Mikhail Vartapetov said on the side’s website, adding that the final diagnosis will be made on Monday.

The 23-year-old Pesyakov has made five appearances this season conceding eight goals. He picked up his injury in the last minute of Saturday's match in Makhachkala in an air collision with ex-Balckburn Rovers center-back Christopher Samba.

Spartak lost both their opening Champions League group matches to Barcelona and Celtic, making next week's game a must-win tie for Unai Emery's side.