Cha-time for Celtic

Celtic have signed South Korea defender Cha Du-ri on a two year deal, subject to a work permit.The 29-year-old is boss Neil Lennon's second signing of the summer following the arrival of Charlie Mulgrew from Aberdeen.Cha played in three of his country's World Cup matches in South Africa, where South Korea reached the last 16 before losing to Uruguay.Cha, who will move to Glasgow from German Bundesliga side Freiburg, will be contracted to Celtic until 2012, with the option of a third year.The 29-year-old has previously played in Germany for Eintracht Frankfurt, Mainz and Koblenz.