BERLIN (AFP) - New Zealand's Valerie Vili retained her shot putt title here on Sunday at the world athletics championships. The 24-year-old Olympic champion had a best mark of 20.44 metres with Nadine Kleinert of Germany taking silver (20.20m) and China's Lijao Gong taking bronze with 19.89m. Vili, daughter of an English father and a Tongan mother, danced for joy on becoming world champion for the second time. "I am satisfied that I could defend the title," she said. "Tonight the German girl pushed me a lot but I wasn't worried, we spent proper time preparing to get the right things done," added Vili. Kleinert was ecstatic at her performance which saw her, at the age of 33, take a third silver at these championships, to add to a bronze, and in front of her own crowd. "This feeling is just so great. I did it like in 2004 (she took Olympic silver in the Athens Olympics) went into the stadium and just had fun. "And together with the fun comes the success. I never thought that I could get gold because I knew that Vili was too strong. But still she took quite a long time to get in front." For Lijao the outcome was something of a surprise. "I am very happy with my result. It was also a little bit of a surprise for me," said the 20-year-old, who finished fifth at the Olympics last year. Vili had to pull out all the stops to retain her title as her two fellow medallists produced personal bests and at one point she was down in fifth place. But she showed her champion's credentials when she produced a superb effort of 20.25m in the third round, overtaking Kleinert, who had already thrown a personal best of 20.06m, and Lijao.Kleinert, though, drew on her reserves and the adrenalin of performing in front of her home crowd to throw another personal best of 20.20m, also on her third effort, pumping the air in delight. Belarus's Natalya Miknevich - silver medalist behind Vili in Beijing - was trailing in fourth. Kleinert failed to improve on her next two efforts and it was Vili who increased the pressure on the home hope when she made a mark of 20.44m in the fifth round.