Overview
- He touched in 42.85 seconds to secure his second gold of the meet after winning the 150m individual medley.
- Italy's Gabriele Lorenzo finished 0.64 seconds behind for silver, with Ukraine's Denys Ostapchenko taking bronze.
- Two days earlier, Topf earned silver in the 50m backstroke S3 after being passed late by Ostapchenko.
- Germany has won at least one medal on each competition day in Singapore, with reports putting the tally at eight overall and five golds.
- Outlets differ on Topf's career world championship total, but his Singapore haul stands at two golds and one silver.