But Gremio have expressed a wish to keep the 24-year-old until the end of the Brazilian season in December, Xinhua news agency quoted Uol as reporting.
Italy's Sampdoria and Turkey's Fenerbahce have also been linked with bids for the Brazilian.
Luan, who has been capped once for Brazil's national team, has scored 59 goals in 206 appearances for Gremio since joining the Porto Alegre club in 2012.
The 2014 Olympic gold medallist is currently tied to Gremio until September 2018.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
Doraiah Chowdary Vundavally is a Software engineer at VTech . He is the news editor of SocialNews.XYZ and Freelance writer-contributes Telugu and English Columns on Films, Politics, and Gossips. He is the primary contributor for South Cinema Section of SocialNews.XYZ. His mission is to help to develop SocialNews.XYZ into a News website that has no bias or judgement towards any.
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