"For that reason, we are extremely pleased that Ralph Hasenhuttl has agreed to become our new manager and do all he can to help guide us back on that path".
51-year-old signed with the saints a three-year agreement.
'I can guarantee you that when you see us playing in the summer it will be different than when you see the team now, ' he said. "We conceded more chances than against Arsenal".
Southampton hit the woodwork one more time through Mohamed Elyounoussi and finally found the net with a neat finish from Austin after Steven Davis' assist, long after the match had been lost.
With Hasenhuettl assessing his players, left back Matt Targett produced some lax defending that allowed Spurs to take a ninth-minute lead.
'It is tough but I am not frightened.
"This managerial change offers us a fresh start and, very quickly, Ralph emerged as our ideal candidate".
Cardiff's latest win lifts them up to 14th in the Premier League table and four points above the relegation zone, and Warnock has praised the fans for helping his side produce their strong home form.
Ralph Hasenhuttl was in the stands to watch Southampton go down to a Premier League defeat at the hands of Tottenham.
"And, like the Liverpool manager, Hasenhuttl is an emotional guy on the sidelines, so sometimes he runs on the pitch after important goals to celebrate with his players just like Klopp did this weekend against Everton".
Last season under Hasenhuttl, Leipzig played in the Champions League for the first time and subsequently reached the Europa League quarter-finals.
- Southampton have earned just nine points from their opening 15 games this season; just three of the previous 18 teams to have nine points or fewer from their first 15 games of a Premier League season have avoided relegation.
He admitted that he used Brighton midfielder Gross as a sounding board, saying: 'Pascal told me about the league, the clubs in the bottom of the league and (he said) it would be very interesting if I come here and try to take over a club here and perform with this club'.