Russia, who finished second in Group A after thrashing Saudi Arabia 5-0, beating Egypt 3-1 and losing 3-0 to Uruguay, will face Group B winners Spain in their round of 16 match in Moscow on Monday morning AEST.

"Spain are great at team play, not only Diego Costa can be a menace, but other players as well. This makes the situation complicated for us. Spain garnered five points in Group B, the team plays the same kind of football they did in the previous years. Russia have a chance to counterattack," Ignashevich told journalists.

Russia's most capped player, having played in 125 games for the national team, also said he did not know whether the team would switch to a new formation with three central defenders.

"I'm not a coach, I don't know if we switch [to a new formation] or not. My job is to train. We're just recovering now, we'll start preparing [for the Spain match] tomorrow," the 38-year-old added.