体坛英语新闻：Oliveira sets South American 100m freestyle record

RIO DE JANEIRO, April 19 (Xinhua) -- Brazilian swimmer Larissa Oliveira set her second South American record in three days when she won the 100m freestyle at an Olympic test event here on Tuesday.

The 23-year-old swam 54.03 seconds at the Olympic Aquatic Center - eclipsing by 0.23 seconds the previous mark held by her compatriot Etiene Medeiros.

Oliveira has now secured a berth in both 100m and 200m freestyle events at the Rio Olympics in August.

On Saturday she set a South American record in the 200m freestyle with a time of 1 minute, 57.37 seconds.

There was drama in the men's 200m medley final, which ended in a dead heat between Thiago Perreira and Henrique Rodrigues. Both swimmers are guaranteed of their Olympic berths.

In the 200m backstroke, Leonardo de Deus secured a Games spot by winning the final in 1 minute, 56.57 seconds.