Keylight and Motion Blur, orange over green

i'm making series of videos of basketball players website.  i'm using keylight remove green screen.  seem have gotten parameters gives results player.  problem basketball.  moves fast in front of green screen there's pretty serious motion blur problem.

 

what have tried making copy of video on layer above , masking ball when in front of green screen , processing giving it's own despill values, , using mask track matte layer below drop out basketball player's layer when ball in air.  improve things bit, because can tighten image on ball bit.  there still sizeable brown smudge orange ball blurs on green screen can't seem rid of.

 

i'm not sure else can do, , don't have time experiment methods, or painstaking minute correction.  have solution?

 

thanks.

since have separate ball layer, can color correct bring orange, removing "brown smudge"?

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