Olympic.org takes a look back at the highlights from the fourth day of competition in Rio on Tuesday 9 August 2016. Michael Phelps won two more gold medals in the space of an hour, in the 200m butterfly and the 4x200m freestyle, bringing his total medal haul to 22. The brilliant Simone Biles lit up the women’s team competition to help the United States to victory.

The winner of six medals, five of them gold, the USA’s Michael Phelps was the undisputed star of the pool at Rio 2016. The most decorated athlete in the history of the Games, he left Brazil with 23 Olympic titles to his name and 28 medals in all. His latest clutch of achievements were among the many high points of a week in which the likes of team-mate Ryan Murphy, Australia’s Kyle Chalmers, Great Britain’s Adam Peaty, China’s Sun Yang, Singapore’s Joseph Schooling and Kazakhstan’s Dmitriy Balandin also excelled.

Michael Phelps offered another tour de force in his dream farewell to swimming, proving himself the all-round master of the pool with victory in the 200m individual medley to collect the 22nd Olympic gold medal of his career at the Olympic Aquatics Stadium on 11 August.

History maker Michael Phelps (USA) has another series of milestones in his sights as he prepares to defend in Rio his 200m individual medley title for the third Games running. If he emerges victorious, to claim a record 22nd gold, he will also become the first swimmer in history to win the same individual event four times.

Michael Phelps delivered the latest of many breathtaking displays at Rio’s Olympic Aquatics Stadium on 9 August, when he secured victories in the 200m butterfly and the 4x200m freestyle relay to extend his record gold medal tally to 21.