Vijender Singh went into the offensive to defend his WBO Oriental and Asia Pacific Super middleweight titles with an unanimous verdict over African champion Ernest Amuzu in Jaipur last night, continuing his unbeaten run in the pro circuit.With this victory, Vijender has now won 10 pro bouts on the trot and retains twin titles. The 32-year-old Olympic bronze medallist has so far enjoyed a great run in the professional career, winning all his nine fights, and last night was no different at a jam-packed Sawai Mansingh Stadium as he emerged as the king of 'Rumble Rajasthan'.Vijender landed some real hard punches on Amuzu's rib-cage to take control of the bout. Amuzu returned the favour with a few of his own, but the West African Boxing Union Middleweight champion could not sustain the tempo against his determined Indian opponent.Vijender played a percentage game during the final round when he had already suffered a muscle pull and didn't attack a lot. In other under-card bouts of the day, Commonwealth Games bronze medallist Amandeep Singh defeated Punjab's Manoj Kumar.Kuldeep Dhanda beat Fateh Singh, Pradeep Kharera got the better of Nikhil Sharma, while Dharmender Grewal beat Harsh Nagar.