Brazilian forward Robinho will be on the bench for AC Milan's Champions League match against Zenit St. Petersburg on Wednesday, a source in the Italian team told R-Sport.

Robinho returned from a month out with a thigh injury in the 2-0 home win over Cagliari a week ago, but is yet to achieve full fitness, the source said.

Fullback Mattia De Sciglio, who also arrived in Russia with the team, is also a doubt, the source said.

Captain Massimo Ambrosini will miss the match due to a minor injury, the source added.

The squad is already depleted with left-back Francesco Acerbi and Algerian center-back Djamel Mesbah not making the trip.

Zenit are missing Portuguese midfielder Miguel Danny, who is recovering from tearing a cruciate ligament, and Russia captain Igor Denisov, who was dropped to the reserves team on disciplinary grounds.

Both teams experienced a disappointing start to their Champions League campaign, with Zenit suffering a 3-0 away defeat to Malaga and Milan drawing 0-0 with Anderlecht at the San Siro.