Russia captain Andrey Arshavin was left frustrated by his side's defensive lapses as they surrendered the lead to draw 1-1 with co-hosts Poland.
The Russians went in front after 37 minutes, when Alan Dzagoev headed in Arshavin's curling free-kick. The lead lasted until the 57th minute when Poland captain Jakub Blaszczykowski equalised with a thunderous left-foot shot.
Russia still look good value for money to progress to the quarter-finals, but Arshavin is unhappy not to have won.
"We started well and took the lead," said the 31-year-old Arsenal midfielder.
"But, after the break, we played too loosely allowing Poland to reply on dangerous counter-attacks.
"We were a little bit tired and not able to apply the pressure we wanted."
Russia need at least a point from their final game against Greece to qualify outright but will still qualify if they lose so long as the Czech Republic draw with Poland.
