Douglas Pereira dos Santos (an haife shi a ranar 6 ga watan Agusta shekarar 1990), wanda aka fi sani da Douglas (ɗan Brazilian Portuguese: [ˈDowɡlɐs] ), dan wasan ƙwallon ƙafa ne na ƙasar Brazil wanda ke taka leda a dama-dama ga Beşiktaş . An haife shi a Monte Alegre de Goiás, Douglas ya shiga sahun matasa na Goias a shekarar 2002, yana ɗan shekara 12, kuma an ba shi matsayi na farko a cikin shekara ta 2009, galibi a matsayin madadin Vítor . Ya sanya ƙwararren masaniyar sa - da Série A - a karon farko a ranar 20 ga watan Yuni shekarar 2009, yana zuwa a matsayin wanda zai maye gurbin marigayi a wasan da suka tashi 2-2 akan Grêmio . Douglas an bashi farkon farawarsa a ranar 15 ga watan Yuni, a cikin rashin gida 0-2 akan Avaí . Ya gama kamfen din tare da bayyanuwa 14 (farawa bakwai, mintuna 741 na aiki), yayin da bangaren sa ya kare na tara. A cikin shekarar 2010, bayan barin Victor zuwa Palmeiras, Douglas ya zama farkon zaɓen ƙungiyar, inda ya bayyana a wasanni 24 amma aka sake shi.