Giroud converted from the penalty spot early in the second half, becoming the 19th player to reach a century of goals for Arsenal.
Gylfi Sigurdsson scored a stunning long-range volley just after half-time to secure Everton's place in the Europa League group stage following a 3-1 aggregate victory over Hajduk Split on Thursday.
Confederations Cup 2017: Cristiano Ronaldo, Fernando Santos critical about St Petersburg stadium pitch
Ronaldo criticised the pitch which earlier had to be hastily relaid after severe criticism from football officials when it cut up badly during the inaugural match there in April.
Russia, who host the 2018 FIFA World Cup, beat Oceania champions New Zealand 2-0 in the opening match of the FIFA Confederations Cup on Saturday.
Spalletti led Roma to a second placed finish in Serie A and a place in next season's Champions League group stage.
Manchester United were defeated in their opening Europa League game while PL rivals Southampton won and Dundalk claimed an impressive draw in Netherlands.
Zenit St Petersburg's Brazilian international Hulk arrived in Shanghai Wednesday to sign for Sven-Goran Eriksson's Shanghai SIPG team, as the cash-flush Chinese Super League embarks on a new round of transfer spending.
Russia striker Artem Dzyuba on Tuesday hit out at English fans following trouble in Marseille, saying that they were being depicted as "angels" and that there were political motivations for blaming Russian supporters.
Russian hooliganism explained from the point of view of Vladimir, a Russia supporter who was present during the clashes in Marseille at Euro 2016.
Russia will heavily rely on squad experience and some good old fashioned USSR work ethic to get through to the latter stages at Euro 2016.
Two months have passed since the draw for the Champions League last 16 was made and much has changed in that time as Paris Saint-Germain prepare to meet Chelsea in one of the headline ties
Dortmund reached the Champions League quarter-finals, surviving a 2-1 second-leg defeat by a spirited Zenit St Petersburg to go through 5-4 on aggregate.
The Portuguese will replace Luciano Spalletti who was sacked this month.
The team has long attracted criticism as the only top Russian side never to have fielded a black player, though rejects allegations that it is policy.
Hulk has had a tough time settling in St Petersburg, with several senior Zenit players apparently unhappy after the club spent 60 million euros on his transfer.