Celtic held a pre-season training camp in Loughborough (England), before continuing their preparations in France with friendlies against Nice, Lyon and Paris Saint-Germain.

[1][2] They rounded off pre-season with friendlies against Ross County and Hibernian at Celtic Park.

[8] On 9 August, Celtic were drawn to face KR Reykjavík (Iceland) in the first qualifying round of the UEFA Champions League.

[9] On 19 August, it was determined that Celtic would face Ferencváros (Hungary) in the second qualifying round of the UEFA Champions League.

On 18 September, it was determined that Celtic would face Riga (Latvia) in the third qualifying round of the UEFA Europa League.

[11] On 24 September, it was determined that Celtic would face Sarajevo (Bosnia and Herzegovina) in the play-off round of the UEFA Europa League.