Alexis Sanchez salvaged a point for Arsenal from their limp 1-1 Champions League opener at Paris St-Germain.
Edinson Cavani glanced PSG ahead after 42 seconds and should have had a hat-trick before half-time, firing wide after rounding David Ospina before slipping to fluff a simple finish.
Sanchez rifled in the rebound from Arsenal’s first shot on target.
Alex Iwobi might have had a late Arsenal winner before Olivier Giroud and PSG’s Marco Verratti were sent off.
Substitute Giroud was brought on to enliven a tame attacking display and picked up two yellow cards in his 27 minutes, the second for an altercation in which Italian midfielder Verratti also picked up a second yellow.
In the other match in Group A, Swiss side Basel were held to a 1-1 draw at home to Ludogorets Razgrad of Bulgaria.