Dzagoev sustained a hamstring injury during Russia's 5-0 drubbing of Saudi Arabia on 14 June and missed his side's next two Group A games.

Meanwhile, the 28-year-old's fellow midfielder Aleksandr Yerokhin, who missed Tuesday's training session due to a minor foot problem, left Wednesday's training early.

Stanislav Cherchesov's men are currently preparing for the round of 16 clash with Spain, which will take place at Moscow's Luzhniki Stadium on Sunday.

Russia will be playing in the knockout stage of the World Cup for the first time, after failing to qualify from the group in their three previous attempts.