I can't believe Djokovic has to go through two servebots in a row at the Brisbane open: Opelka today and Mpetshi Perricard next. The later is already a set up v Mensik right now.
Djokovic is the greatest returner of the tennis ball, and his skill will be put to test in the next two rounds.
Btw, I mean no disrespect to Opelka and Perricard by referring to them as servebots. Serve is as big a skill as any other tennis shot.