The Gunners moved up to eighth in the Premier League table after a 3-1 victory at St Mary’s just three days after losing on the south coast in the fourth round of the FA Cup.
“We have 29 points, we knew such situations could come for us, if we have injuries it certainly hurts us more than the top teams.
“Everyone can look for themselves how much it affected the result today, we conceded two easy goals in the first half.
“The effort was good in the first half, the quality wasn’t good enough today to be competitive against this team.”
Asked if he would like to add another full-back before the transfer window closes on Monday, Hasenhuttl replied: “If we have the money and the chance to get one, yes I would like to do it.”