The RB Leipzig striker has been linked with the Reds ahead of the January, despite their attacking options.
But Heskey told the Daily Express: "You always want to challenge yourself, regardless of who else is there.
“When I came to Liverpool, Robbie Fowler and Michael [Owen] were there. Players like that.
“I think Titi Camara was there too and he had a good start to the season.
“[Could Werner join Liverpool?] I don't see why not."