The Gunners will be hoping to negotiate their way past the Rojiblancos when they visit the Wanda Metropolitano for the second leg of their semi-final fixture.
It ended 1-1 at the Emirates Stadium last Thursday after Alexandre Lacazette's opener was neutralised by Antonio Griezmann's 82nd-minute effort.
However, Aubameyang, cup-tied for the competition this season, has charged the team with 'positive energy'.
"Giving my positive energy to my boys. Good for today, Arsenal," Aubameyang wrote on Instagram.