She challenged six other swimmers on the second heat including Singapore's Tao Li, who finished fifth in the 100 m butterfly final.

She challenged five other swimmers on the first heat, including 16-year-old Milica Ostojić of Serbia.

He challenged seven other swimmers on the same heat as Sydney, including his former rival Razakarivony.

He challenged seven other swimmers on the third heat, including top medal favorite Tomomi Morita of Japan.

He challenged seven other swimmers on the seventh heat, including top medal favorite Michael Phelps.

He challenged seven other swimmers on the third heat, including top medal favorite David Davies of Great Britain.

He challenged seven other swimmers on the final heat of five, including top medal favorite Michael Phelps of the United States.

She challenged seven other swimmers on the same heat as Sydney, including 15-year-old Maria Bulakhova of Russia.

In the 400 m freestyle, Lehtonen challenged six other swimmers on the second heat, including three from Latin America.

He challenged seven other swimmers on the fourth heat, including top medal favorite Larsen Jensen of the United States.