"The turning point was getting three quick wickets. First we had Trisha Chetty, Dane Van Niekerk and Captain Mignon du Preez," she told reporters at the post-match press conference here after they restricted South Africa to 104-7.
Even the rival South Africa Captain Mignon du Preez lavished praise on Sri Lanka bowlers, who stifled the Proteas batters when chasing an achievable target of 115 runs.
"Yes, we thought we could achieve the small target. We just had to score run a ball, and did not think of going for big shots, but Sri Lanka took three quick wickets in the middle, which resulted in runrate creeping up, and eventually it became difficult for fresh batters to hit from very first ball," she said.
"Before walking into the middle to defend 114 runs, I told my team to bowl as many dots balls as possible in first six overs and then give singles, but not boundaries. Our bowlers Udeshika and Sugandika bowled well, which restricted South Africa from running away with a victory," she said.
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Talking about captaincy, Atapattu said: "It is a burden, but it did not affect my normal game. I am happy my team played two strong teams - New Zealand and Australia, and also scored 120 plus in all the matches we played."
"From the personal point of view, we have been disappointed with our performance in the last two weeks in the world cup. We would like to work on our problem areas and come back strongly," she told reporters.
Asked whether their bowlers lost the trick by giving a few more runs in last few overs, Du Preez said: "It is quite obvious that a team would go after the bowling in last overs - that is expected. However, 115 is gettable, but our batters once again let our bowlers down."
"Not really. As a captain you have several strategies to execute. Of course at the end of the match, there are many talks for not getting the plan right. Nevertheless, Luus has done well and I am pretty happy with her.