manny pacquiao will take on floyd mayweather at the mgm grand in las vegas on saturday .
the filipino boxer is one of the biggest stars in the world of sport after a series of big fights .
pacquiao spent his early years boxing in manila in the philippines and was pictured training as a 17-year-old .
pictures taken in 1996 show pacquiao training at the lm gym in manila before he became a star .
the 36-year-old arrived in las vegas on tuesday after a 270-mile journey from los angeles on his luxury bus .
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