You know you've achieved something special in the sporting world when the great Pele is tweeting you and congratulating you.
Well that's exactly what has happened for American swimmer Michael Phelps, who last night won his 22nd Olympic gold medal.
Despite announcing his retirement after London 2012, Phelps made the decision to return to the pool and return to the Olympic Games this summer in Rio.
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After a week of competing, he's already proven that his decision was the correct one. He's competed in four events, and he's won four gold medals.
So far, Phelps has obtained gold in the Men's 4x200m freestyle relay, the Men's 200m butterfly, the Men's 4x100m freestyle relay, and the Men's 200m individual medley, taking his gold medal collection from 18 to 22 at an Olympic Games.
The 31-year-old has a chance to make it five out of five in the Men's 100m butterfly, which takes place at 02:12 on Saturday morning.
If he is successful in that race, it will take his tally to an incredible 23 gold medals at an Olympic Games, and his achievements have recently been acknowledged by one of sport's greatest ever figures.
Pele has taken to his official Twitter account to congratulate Phelps for his achievements, and has praised him for setting an incredible example for future Olympians.
The former Brazilian footballer, who pulled out of the Olympic opening ceremony due to health issues, has been tweeting throughout the Olympic Games, and it's Phelps who has recently caught his eye.
Phelps now has just one race left at Rio 2016, which could also be his last ever Olympic race, and no doubt the whole world will want the Olympic hero to go out with a bang.
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