FT
Arsenal
1
–
0
Udinese
—
FT
Udinese
1
–
2
Arsenal
—
FT
Borussia Dortmund
1
–
1
Arsenal
Started
FT
Arsenal
2
–
1
Olympiakos Piraeus
Started
FT
Marseille
0
–
1
Arsenal
Started
FT
Arsenal
0
–
0
Marseille
Started
FT
Arsenal
2
–
1
Borussia Dortmund
Started
FT
Olympiakos Piraeus
3
–
1
Arsenal
—
FT
AC Milan
4
–
0
Arsenal
—
FT
Arsenal
3
–
0
AC Milan
—
Faded rows: team matches without P. Mertesacker in the lineup