The Australian batter was given a major reprieve after appearing to edge Ebadot Hossain’s delivery through to the wicketkeeper.
Bangladesh reviewed the decision, but the available audio technology failed to detect a clear edge, allowing Smith to remain at the crease.
Speaking after the opening day, Smith was candid about the moment.
“Did you nick that? I think so, yeah.”
Smith said he felt something at the time, but technology ultimately worked in his favour.
The 36-year-old had already survived another early scare after being dropped at third slip on 2. He went on to provide Australia’s main resistance, scoring 71 off 109 balls with seven fours and a six.
However, his innings eventually ended against Hasan Mahmud, who finished with a superb 6 for 55 as Australia were bowled out for 198.
Bangladesh then produced an encouraging response, reaching 96 for 1 at stumps.