The Danish coach has been working with the Reds since the summer of 2018, with Jürgen Klopp keen to take advantage of the specialist information he offers.
Take a look at Gronnemark's analysis below...
Roberto Firmino's finish at Southampton on August 17
Firmino scores the Reds' second at St Mary's
"We had a really good pressure situation with Sadio Mane and Bobby Firmino [on] the Southampton defence. Then Sadio got the ball, passed to Firmino and scored.
"I have approximately 40 different throw-in tools, I'm working with three different zones too and then I have specific assignments for every player.