Ciro Immobile struck twice on Sunday to reach 25 league goals for the season, three more than Robert Lewandowski.
Rules
UEFA's coefficient is the yardstick for points weighting and the idea behind it is to reward players who score goals in leagues that are considered to be of a higher standard - thus more difficult to score in.
Goals scored in the continent's top five leagues being multiplied by a factor of two, those scored in the leagues six to 21 are multiplied by a factor of 1.5 and the remaining leagues by a factor of one.
The top five European leagues are: La Liga, the Premier League, Serie A, the Bundesliga and Ligue 1.