"It was good to get a win against my old club but it was even better to meet up with my old players," Sousa said after the match at The Liberty Stadium on Saturday.
"It is important to beat those teams who are going for promotion as it shows you can win against quality.
"Today's victory was important with the international break coming up but for 30 minutes it was difficult against them.
Rangers had two players sent off during the second half of the game but Sousa ruled out that the Swans players had any bearing on the referees decision to dismiss the pair.
"We took full advantage of being against nine players but we are an honest team and never went out looking for yellow cards."