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Gervonta Davis, America’s youngest world champion, will travel to Britain to defend his IBF Junior Lightweight World Championship against undefeated No. 1-ranked contender and local favorite Liam Walsh on Saturday, May 20 on SHOWTIME from Copper Box Arena in London. Davis vs. Walsh is part of a split-site, four-fight SHOWTME CHAMPIONSHIP BOXING telecast that begins at 6 p.m. ET/3 p.m. PT. In the main event, Gary Russell Jr. will make his second featherweight title defense and long-awaited homecoming against mandatory challenger Oscar Escandon live from MGM National Harbor just outside of Washington, D.C.