The 28-year-old recorded a time of 48.09secs to triumph at the VIDENA National Sports Complex aquatics centre. 

In the process, he defeated five-times Olympic gold medallist Nathan Adrian of the United States, who finished second in 48.17.

Third place went to another American, Michael Chadwick, in 48.88.

Delfina Pignatiello of Argentina doubled her Lima 2019 medal haul after winning the women's 800m freestyle, having also topped the podium in the 400m.

The Youth Olympic silver medallist raced to victory with a time of 8:29.42, with the US’ Mariah Denigan touching 4.76 seconds later.

Brazil’s Viviane Eichelberger claimed the bronze medal in a time of 8:36.04.

Chierighini and Eichelberger were the only two non-Americans to win in the pool, with the US securing seven gold medals.

This included Anne Lazor and Daniel Carr, who both got their second gold of Lima 2019.

Lazor had already won the women’s 100m breaststroke, this time triumphing over double the distance.

She led the women’s 200m breaststroke in a time of 2:21.40, a Pan American Games record.

Silver went to her team-mate Bethany Galat in 2:21.84, while Argentina’s Julia Sebastian was third in 2:25.43.

Men's 200m backstroke champion Daniel Carr was then victorious in the 100m, touching the wall in 53.50, with Brazil’s Guilherme Guido just 0.04 behind.

Trinidad and Tobago’s Dylan Carter placed third with a time of 54.42.

Andrew Abruzzo of the US acheived his third gold medal of the Games, following on from wins in the men's 400m freestyle and mixed 4x100m freestyle relay. 

His next triumph came in the 800m freestyle, recording the winning time of 7:54.70.

Following him was Brazil's Miguel Leite Valente in 7:56.37 and Mexico's Ricardo David Vargas Jacobo in 7:56.78.

The US ended a fruitful evening with gold in the mixed 4x100 metre medley relay, dominating the field with 3:42.96.

Brazil claimed second place in 3:48.61, while Canada were third in 3:49.97. 

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