Khan said in a Twitter post on Saturday that they “had a good professional chat and maybe in the future we work together.”
Khan lost his WBC and WBA light-welterweight titles with a surprise fourth-round defeat to unheralded American Danny Garcia in July.
He had previously lost in a split decision to Lamont Peterson in a controversial fight with the American in December. A rematch was ordered but was canceled when Peterson tested positive for synthetic testosterone, restoring the WBA belt to Khan.
Roach has been Khan s trainer since 2008 and also looks after Manny Pacquiao and Julio Cesar Chavez Jr.