In Boxing, Shiva Thapa and three other Indian pugilists have entered the semi-finals of Grand Prix Usti Nad Labem tournament in the Czech Republic, assuring at least four Bronze medals for India.In the 60 kg weight category, Shiva defeated local favourite Erik Huleiv in a unanimous verdict to enter the last-four stage.Gaurav Bidhuri, Kavinder Bisht and Amit Phangal also entered the semi-finals of their respective categories.Sumit Sangwan and Manish Panwar advanced to the quarterfinals.Seven of the nine Indian pugilists competing in this tournament have qualified for next month's World Championships in Hamburg, Germany.