The Real Madrid forward breaks his own jointly held record to net double figures in a single season of the competition's first round, netting four goals against Malmo.
Real Madrid forward Cristiano Ronaldo has become the first player to score 10 goals in the group stage of a Champions League campaign.
The Portugal international achieved the feat with his third goal as his side put Malmo to the sword on Tuesday and netted a fourth soon afterwards.
Ronaldo was previously the joint holder of the record with nine, alongside Luiz Adriano, but now becomes the outright leader as he top-scores in the group stage for the fifth time - also a record that no other player can match.