A defeat to 16th-placed Everton could drag the Saints into the thick of a relegation battle and Soares has urged his team mates to use recent results as extra motivation to stay clear of the drop zone.
"We need to be upset. If you are not upset then something is wrong. We need to think about our mistakes and what we need to improve," Soares is quoted as saying by the Daily Echo.
"It's normal to be upset and upset doesn't mean you go out there and let your head go down. It means we go out there and you want to show even more and you want to climb out of the hole and come back to winning ways.
"We need to definitely go out there and fight with all our weapons. It's a question of attitude, we need to demand the best from our players and not 60 or 70 percent because in the Premier League it's not enough."
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The 26-year-old believes Southampton gave up too easily during their 3-0 loss to Liverpool last weekend and says the club must react more positively in future games.
"We had one or two mistakes, we conceded the goals and after that it's tough to comeback. Our reaction was not the best," Soares added.
"Maybe we need to consider our reaction and work on that. We need to make sure we never give up because there's always a chance to come back. We need to improve that."
(Reporting by Aditi Prakash in Bengaluru; Editing by John O'Brien)
