Olivier Giroud Arsenal
Arsenal forward Olivier Giroud celebrates after scoring against Sunderland in their English Premier League game, September 14Reuters

Arsenal striker Olivier Giroud confirmed he would be fit for the Champions League group stage opener against Marseille amid fears that the in-form French international could be ruled out through injury.

Giroud seemed to twist his knee or ankle while going for a shot on goal in the final moments of the 3-1 victory over Sunderland in the English Premier League on Saturday, leading to Arsene Wenger voicing his concern over the striker.

However, Giroud, who has started this season like a house on fire, scoring four league goals in the first four games, allayed fears, saying it was nothing too serious and he fully expected to be fit for the Marseille trip on Wednesday.

"It is not bad actually, not as bad as I first feared," Giroud said when asked about the seriousness of the injury. "I got a kick earlier in the game but no-one was near me when I did it this time.

"I tried to connect with the ball a little bit too early and I caught my foot in the grass. I twisted my ankle but fortunately, it is nothing major.

"I am OK, sure I will be fine (for Marseille)."

Arsenal, who have been drawn in the group of death along with the French side, Borussia Dortmund and Napoli, are extremely thin in the striking department, with youngster Yaya Sanogo also out with an injury.

Wenger failed to bring in a new forward before the transfer window shut and the onus will be on Giroud, not just to keep banging in the goals, but also to stay fit until at least the January transfer window.

"This is the best run I have had since I joined Arsenal and I think it is also my best form too," Giroud added. "And now that we have our new player, it can get even better.

"We knew all about his (Mesut Ozil's) quality but when you are out there on the pitch, playing with him, he is even better.

"He is always looking for opening and sees things so early while his first touch is simply amazing. You can see immediately that he is going to make this team better. But let's face it, with his quality, he would make any team in the world better.

"Not every striker is lucky enough to have players like Ozil, Aaron (Ramsey), Jack (Wilshere), Theo (Walcott) and (Santi) Cazorla behind them. I feel very fortunate."