Hamilton-Rosberg feud reignites in ShanghaiUpdated 2057 GMT (0457 HKT) April 12, 2015 Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds. Photos: China crisis for Rosberg?World champion Lewis Hamilton was all smiles after winning his second race out of three in the 2015 Formula One season, triumphing at the Chinese Grand Prix in Shanghai.Hide Caption 1 of 6 Photos: China crisis for Rosberg?However, the British driver's Mercedes teammate Nico Rosberg was not so happy after finishing second. Hide Caption 2 of 6 Photos: China crisis for Rosberg?The German used the post-race press conference to accuse Hamilton of deliberately going slowly at certain stages to allow Ferrari's Sebastian Vettel to gain on him. Hide Caption 3 of 6 Photos: China crisis for Rosberg?Hamilton denied the allegations, but the incident has again stoked tensions within the team -- which last season threatened to overshadow Mercedes' complete dominance. Hide Caption 4 of 6 Photos: China crisis for Rosberg?Hamilton extended his lead to 13 points over Vettel ahead of the next race in Bahrain, having won at Shanghai for the fourth time in his career. Hide Caption 5 of 6 Photos: China crisis for Rosberg?Vettel's third-placing meant, for the first time in F1 history, the same three drivers have appeared on the podium for the opening three races of a season. Hide Caption 6 of 6Nico Rosberg accuses his Mercedes teammate Lewis Hamilton of deliberately holding him back at the Chinese Grand Prix.