By Mitch Phillips LONDON (Reuters) -Britain’s teenage U.S. Open champion Emma Raducanu lived up to her star billing on her first appearance on Wimbledon’s Centre Court by overcoming the awkward challenge of in-form Belgian Alison van Uytvanck 6-4 6-4 in the first round on Monday. Having come into the tournament on the back of a wretched run of injuries and with barely any match practice on grass it was an impressive display by the 19-year-old. Van Uytvanck is ranked 46th in the world but has a liking for grass having won 12 of her 14 matches on the surface this year, including two second-tier …