FT
FK Jablonec
2
–
4
Celtic
—
FT
Celtic
3
–
0
FK Jablonec
—
FT
Celtic
2
–
0
AZ Alkmaar
—
FT
AZ Alkmaar
2
–
1
Celtic
—
FT
Real Betis
4
–
3
Celtic
—
FT
Celtic
0
–
4
Bayer Leverkusen
Sub
FT
Celtic
2
–
0
Ferencvarosi TC
Sub
FT
Ferencvarosi TC
2
–
3
Celtic
Sub
FT
Bayer Leverkusen
3
–
2
Celtic
—
FT
Celtic
3
–
2
Real Betis
—
Faded rows: team matches without G. Giakoumakis in the lineup