Can't check speed of each moving sprite in group

[ForgeableSum]

So I'm moving sprites across the screen with moveToXY and continually checking the velocity (in the updates function) to see if the sprite makes it to its destination, like so:

 

 

if ((player.body.speed > 0) && (reachedDestination(player,destination))) {


    player.body.velocity.x = 0;

    player.body.velocity.y = 0;


    }

 

This works fine, until I add the player to a group, and try to call this function on each member of the group:

 

    units.addChild(player);


    units.foreach(function(unit) {


    if ((unit.body.speed > 0) && (reachedDestination(unit,destination))) {


    unit.body.velocity.x = 0;

    unit.body.velocity.y = 0;


    }


    }); 

For some reason, unit.body.speed always shows up undefined. unit.body.velocity.x or y doesn't work either. I'm baffled as to why the function works on a single object but not on multiple.