Her quickest time since that era was the 53.48 she registered in 2011 in Shanghai .
The 25 - year - old will need to score a swim in that realm in order to punch her ticket to Rio .
Her quickest time since that era was the 53.48 she registered in 2011 in Shanghai , so the 25 - year - old will need to score a swim in that realm in order to punch her ticket to Rio .