Johannesburg: Olivier Giroud produced a scintillating performance by netting a hat-trick as Arsenal overcame Olympiakos 3-0 to progress through to the Champions League knockout stages.


Arsenal's French forward Olivier Giroud celebrates scoring during the UEFA Champions League Group F football match between Olympiacos and Arsenal at the Georgios Karaiskakis Stadium in Piraeus. Pic/AFP

The Frenchman put Arsene Wenger's side ahead in the 29th minute before doubling the lead four minutes into the second half.