Italian newspaper La Gazzetta dello Sport wrote that he met with Sky boss David Brailsford over a week ago, after the Giro d'Italia Piancavallo stage. They reportedly discussed his plans for the remainder of the season.
Viviani had said in April that he felt burned and upset with the team's Giro decision. He had raced the last two editions, winning a stage in 2015.
The Italian daily newspaper reports that he wants to line up in the Vuelta a España on August 19, when Chris Froome should be trying again for the Spanish title.
Another plan could see him race a series of one-day and short stage races like in 2015, when he took home six victories.
Hours after Sky's Mikel Landa won at the Piancavallo ski resort this was the topic at dinner as well as the 2018 season.
Viviani has helpers like Lukasz Wisniowski, Jonathan Dibben and Owain Doull, but wants a robust lead-out train and a clear and prestigious race schedule.
If the team and Viviani cannot agree, the newspaper reported that the conditions could exist to allow him to leave his contract one year early. His agent was unavailable when called for comment on this article.
Viviani has ridden for Sky for three years, joining in 2015 when the Italian Cannondale team folded.
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