Former Chelsea defender Branislav Ivanovic says they cannot afford to underestimate Zenit St Petersburg.
Chelsea have been drawn alongside Juventus, Zenit St Petersburg and Malmo in Group H of the Champions League.
"It's an exciting draw," said Ivanovic.
'My two ex-teams are in the same group and this is going to be very interesting to see the games. I was very proud to score the first official goal in history at Zenit's stadium.
"The stadium is really incredible and I hope everyone will enjoy the great atmosphere. It is one of the best stadiums I ever played in."
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