Specialist throw-in coach Thomas Gronnemark is now working with Brentford.
The Dane spent several years on the staff at Liverpool, but is now with today's opponents Brentford.
"There will be no challenges around the fact I have coached both teams - my coaching is tailored to specific needs," Gronnemark told The Mirror.
"All teams have contrasting playing styles and approaches, therefore I have taught in many different ways."
The Bees meet Liverpool at Anfield this afternoon.