Manchester United are considered front-runners to sign Michael Olise should the winger leave Crystal Palace this summer, sources told ESPN. Olise, 22, is understood to have a release clause in his contract that becomes active after the end of the season, and United’s new leadership group under minority owner Sir Jim Ratcliffe have identified Olise as key target in their summer rebuild. – Stream on ESPN+: LaLiga, Bundesliga, more (U.S.)…