Champions League preview: Zenit St. Petersburg v Benfica

Benfica's 11-match winning streak in all competitions will come under threat when they travel to Russia to meet Zenit St. Petersburg.
The first leg of the round-of-16 Champions League tie will see the leaders of both the Portuguese and Russian top flights collide on Wednesday.
Jorge Jesus' Benfica are five points clear of Porto atop Liga Sagres after a superb run of form.
The free-scoring side have hit the back of the net in their last 38 competitive fixtures; the last time they failed to score was in a 1-0 Europa League loss in the second leg of their semi-final against Sporting Braga.
The form of Oscar Cardozo has been crucial, with the Paraguayan having bagged 20 goals for the club in all competitions this season, including 11 in his last 10 appearances.
Spanish forward Rodrigo has 13 goals this season, and with five in his last four matches he also enters the match in red-hot form.
Benfica's terrific record in the Champions League this season will give them further confidence, with the Portuguese outfit one of just three sides to go through the group stages undefeated.
Another battle that Benfica face is the freezing weather in Russia, which is sure to play into the hands of the first-leg hosts.
Forecasts suggest the temperature will be below minus 10 degrees, which will surely make life difficult for the visitors.
Zenit have not been in especially good form this season in Europe and they have not played a competitive match since snaring a point in a goalless stalemate at Porto on December 6.
Prolific striker Alexander Kerzhakov will be Zenit's main threat having netted 16 goals from 22 league appearances this season.
Portuguese playmaker Danny will miss out for Zenit due to a knee injury, as will Vyacheslav Malafeev (calf) and Domenico Criscito (food poisoning).

Benfica are likely to be without Javi Garcia (knock) but Emerson and Luisao (thigh) should feature.