The Saints host the Blues at St Mary's on Saturday with the Argentine boss feeling confident despite winning just twice since he took over from Nigel Adkins in January.
"I think we had a chance to win in every game we have had, like against Everton and Wigan," Pochettino said.
"From all the games, aside from the QPR one which I wasn't really pleased with my team's performance, I did think we were almost able to win all those games.
"We lacked that kind of effectiveness against the smaller side, but overall I am really pleased with my side's performance and how they have been working."
However, Pochettino was not worried about next week's meeting with fellow relegation battlers Reading.