FC Twente defender Douglas is under consideration at Arsenal.
Despite the arrival of Laurent Koscielny from Lorient, Arsenal boss Arsene Wenger wants to add another centre-half to his squad for next season.
Arsenal scout Steve Rowley has watched Douglas extensively in the past season and recommended Wenger take a closer look at the Brazilian.
Wenger has been studying DVDs of Douglas while in South Africa and is considering making an £8 million bid for the ball playing centre-half.
