It looks as though everything is going swimmingly for Floyd Mayweather Jnr as he continues his Manny Pacquiao mega-fight preparations. Mayweather Jnr caused a splash as he took to the pool before completing a few lengths as his trainer looked on during his Sunday session. The video posted to his Instagram also shows the 38-year-old boxer testing his muscles against the resistance of the water as he continues his impressive training routine. Floyd Mayweather Jnr took to the swimming pool to continue his mega-fight preparations . The boxer enjoyed a few laps of the swimming pool before doing some underwater resistance training . Mayweather Jnr continued his pre-fight preparations by doing a few lengths of a swimming pool . Mayweather Jnr's trainer looks on as the boxer finishes his swimming routine ahead of mega-fight . On Saturday Filipino-fighter Pacquiao tested his fitness against the steepness of some mountain roads. It is now less than a month until both boxers meet in Las Vegas for what is being dubbed as the richest fight in boxing history. The fight on May 2 is expected to break the pay-per-view record of $152million set by that fight in 2013, and is also expected to surpass the 2.5 million buys that Mayweather's fight against Oscar De La Hoya accumulated in 2007. Manny Pacquiao trains with his team at Griffith Park in Los Angeles, California ahead of the mega-fight . Pacquiao and his team do some stretches after climbing to the mountain's summit during a training sessio . Pacquiao took to the mountains as he prepares to take on Floyd Mayweather Jnr in May .
Floyd Mayweather Jnr hit the swimming pool as he continued his training .
Boxer did laps of the pool as well as water resistance muscle work .
Mayweather Jnr is training ahead of mega-fight with Manny Pacquiao .
It is now less than a month before boxing duo meet in Las Vegas .