Liverpool boss Jurgen Klopp is wary facing Pierre-Emerick Aubameyang today.
Klopp managed Arsenal striker Aubameyang when the two men were at Borussia Dortmund.
"He is outstanding, as a player and as a person," said Klopp.
"He has speed and finishing skills. It makes him an exceptional player."
Aubameyang is expected to start for the Gunners against the Reds today.