Keita was on the scoresheet for the second game in a row as he bagged the opening goal in Liverpool's 2-0 victory over FC Porto on Tuesday in the first leg of their Champions League quarter-final.
The fifth-minute strike arrived just a matter of days after the Guinean opened his Reds account at Southampton in a 3-1 Premier League win.
And Van Dijk is not at all surprised by Keita's contributions in the last two crucial encounters for Jürgen Klopp's side.
"He's a fantastic player. We see it day in, day out," the centre-half told Liverpoolfc.