Celtic could be handed UEFA Champions League play-off lifeline
The Polish club say Bartosza Bereszyński may have been due to serve a suspension against Celtic.
Celtic could be reinstated in the UEFA Champions League qualifiers after the governing body opened an investigation into claims Legia Warsaw fielded an ineligible player.
Bartosza Bereszyński came on as a substitute with four minutes to go at Murrayfield. But the governing body are considering a complaint the player should have been suspended for the match.
In a statement, Legia confirmed they have prepared a submission to UEFA regarding the matter.
If found to have fielded an ineligible player, Legia could be forced to forfeit the second leg.
UEFA regulations state that Celtic would be awarded a 3-0 win. In that case, having lost the first leg 4-1 to their Polish opponents, the Scottish champions would progress on away goals to the play-off round stage.
Bereszyński was sent off in the UEFA Europa League last season. The duration of his subsequent ban was for three games but he missed Legia's next three UEFA matches against St Patrick's Athletic and the home leg of his side's tie with Celtic.
UEFA regulations however state that a ban only applies to a player if he is listed in a club's squad for matches. If the player in question was not on Legia's squad list for the St Patrick's tie, he would have been ineligible for both Celtic matches.