manny pacquiao has a better chance of beating floyd mayweather now than he did in 2010 .
the pair came close to agreeing a big-money bout five years ago but it eventually fell through , leaving the boxing world waiting and wondering whether they would ever meet .
but after half a decade of speculation , the pair will finally go head-to-head in las vegas on may 2 - and roach believes his man will have the advantage at the mgm grand .