Well grounded: Harlequins poster boy Marcus SmithPICTURE: Getty ImagesHARLEQUINS have no concerns that fame will go to the head of their outside-half Marcus Smith who has become England’s poster boy after diving into international rugby with a big splash.England’s head coach Eddie Jones said earlier this month that he was intent on shielding the 22- year-old Smith from the hype surrounding him to avoid what he called the distractions Emma Raducanu had to deal with after winning tennis’ US Open earlier this year.“We have a different relationship with Ma...