A narrow but drama-free 1-0 win over Ghana on Friday was enough for Colombia to book the last spot in the World Cup last 16.The Colombians will now face Switzerland, who defeated Algeria 2-0 on Thursday, for a chance to reach the quarter-finals and equal their best-ever result at a World Cup.Jhon Arias scored the precious winner in the 14th minute, which was his first goal at the tournament.Substitute Luis Suarez dazzled down the right and played a cross for Arias, who was unmarked as he found the back of the net.Suarez was brought on in the eighth minute to replace Jhon Cordoba, who could not continue playing after he seemed to have suffered a groin injury.Ghana goalkeeper Lawrence Ati Zigi made a super save to deny Johan Mojica a second for Colombia before the break, while Luis Diaz was on target in the 56th minute but had his effort ruled out for offside.