Brentford have contacted Wellington’s agent, Robson Ferreira, with a view to opening negotiations with Sao Paulo, Globo Esporte reported on Monday.
It added that CSKA Moscow had also shown interest in the 22-year-old.
It is understood Brentford sought to fast-track the talks so that a deal could be reached before the Premier League’s transfer deadline on Friday.
Welington has made 18 first-team appearances across all competitions for Sao Paulo this season, becoming a regular starter under manager Dorival Junior.
Brentford are currently ninth in the 20-team Premier League standings with a win and two draws from their first three matches of the season.
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