RALPH Hasenhuttl is unsure how serious injuries picked up by striker duo Armando Broja and Adam Armstrong at Arsenal will prove to be.

Both men were forced off during Saints' 3-0 defeat at Emirates Stadium.

Armstrong, who was brought into the side to replace the injured Che Adams, required treatment during the first half on what appeared to be a calf problem.

The former Blackburn Rovers man played on, before having to be withdrawn two minutes before half-time and replaced by Mohamed Elyounoussi.

Then, with 20 minutes to play, Broja hobbled off with Lyanco coming on as Saints changed their system, with Nathan Tella and Nathan Redmond ending the game as the front two.

Asked for an update on the severity of Armstrong and Broja's injuries, Hasenhuttl said: "We don’t know yet. Hopefully not too serious.

"But it was not possible for them to continue.

"The signs before the game haven’t been the best today, and hopefully we have not more injuries now because a tough time of the season is coming."

Asked if it could alter his plans in January with striker trio Broja, Armstrong and Adams all struggling with injuries, Hasenhuttl added: "We will look how serious it is, how long they are out and then we will look."

Saints were also without suspended duo Oriol Romeu and Mohammed Salisu, as well as the injured Alex McCarthy, Fraser Forster and Stuart Armstrong for the trip to Arsenal.

Hasenhuttl's men head to Crystal Palace on Wednesday (7.30pm).