The French international opened the scoring for the Gunners against Everton on Sunday and Arsene Wenger’s side ultimately ran out 2-0 winners.
The result saw Arsenal climb back above Manchester United and reclaim third place in the Premier League table, and Oxlade-Chamberlain reserved special praise for a player who now has 10 goals since his return from injury.
“Oli’s always there or thereabouts when it comes to scoring goals,” Oxlade-Chamberlain said.
“That’s just what we need; he can score goals not just when we’re dominating the game but he can really turn the game on its head with a goal from a set-piece or out of nothing and that’s what he did.”
Giroud had a match to forget against AS Monaco last week, missing a number of chances as Arsenal crashed to a 3-1 defeat in the first leg of the last-16 tie.
Wenger’s side still have 90 minutes to turn things around and it is likely that Giroud will be key to any potential change in fortunes against the Ligue 1 side.
Before that, Arsenal have another Premier League match to focus on – against Queens Park Rangers – before a FA Cup quarter-final tie against Manchester United at Old Trafford.
As his teammate said, Giroud has the ability to turn a match on its head, and he may have to do that a few more times in the weeks ahead.