Celtic have been reinstated into the Europa League, after qualifying opponents FC Sion were expelled for fielding ineligible players after they broke a transfer embargo placed upon them.
The Swiss side had been banned from making new signings over the summer, but included five ineligible players in their squad for the two Europa League fixtures against Celtic, with Pascal Feindouno, Gabri, Mario Mutsch, Jose Goncalves and Billy Ketkeophomphone all taking to the field.
After a 0-0 draw in the first leg, Sion ran out 3-1 winners at home last Thursday to seal their place in th group stages, but now Celtic have been awarded both games 3-0 by means of forfeit.
Celtic now take their place in the tough Group I and will face Atletico Madrid, Udinese and Rennes.
A Celtic spokesman said of the decision: "We have been advised by UEFA that the two protests relating to the matches against FC Sion have been upheld, as a result of which each match has been forfeited in favour of Celtic.
"We are pleased by this decision, the approach which has been taken by UEFA and the fact that UEFA rules and regulations have been upheld. We are also grateful for the support of the SFA in this matter."
Sion have the right to appeal to UEFA and are given three days following the notification of any decision to lodge their protest in writing.