Frank Lampard wants Hakim Ziyech to solve Chelsea's "puzzle" of struggling to turn dominance into goals next season.
Ajax winger Ziyech will join Chelsea in the summer in a E40million deal with Lampard hailing the 26-year-old's capture as an important coup for the Blues.
Lampard has lamented Chelsea's inability to cap long stretches of pressure with goals this term and is confident Morocco star Ziyech will help the Blues solve that problem.
"I think he has an incredible left foot; he has an elegance about him that can find a pass," said Lampard.
"I see a player that hopefully can have a big imprint on our team. At times this season we've missed the player with the finishing touch. Hopefully he can be a piece of that puzzle."
Ziyech has starred as one of the most prolific assist makers in Europe in the last three years at Ajax, and Lampard admitted tracking the tricky forward for some time.
"He'll bring quality in terms of ability to make assists and score goals," said Lampard.
Chelsea will host Manchester United at Stamford Bridge on Monday night, with Lampard admitting Tammy Abraham is a doubt to start.
Abraham continues to battle his ankle problem, despite featuring in the 2-2 draw at Leicester before the winter break.
Neither Christian Pulisic nor Ruben Loftus Cheek will be fit to take on the Red Devils.
Lampard said: "Tammy is still feeling the effects and we had to take him out of training a couple of times this week. So we hope he'll be OK."