When Bangladesh toured South Africa, in a tour where every Bangladeshi seam bowler was getting Tonked, Roy looked the most impressive and troubled South African batsmen the most. he even picked up a few wickets where his other colleagues have picked up almost none.
http://www.espncricinfo.com/series/1...of-sa-2017-18/
maybe Walsh doesn't like him as much for some reason....(I am speculating, this has no hardcore factual basis)