Gronnemark had worked in the Danish Super League until being handed a big break during the 2018/19 season when he was in the car with his wife and two children as Liverpool boss Klopp phoned him for the first time.
“It felt really unreal, even though I've always dreamed about coaching, but up to Liverpool I've primarily coached Danish Super League clubs," the 45-year-old Dane said.
“I first got a voicemail and I didn't know it was Jurgen, I saw the +44 number on the phone and didn't know it was him until I heard it, it was shock and unreal, but I got the feeling that this was an amazing chance."
The next week Gronnemark arrived at Melwood to meet Klopp, and started working with 21 Liverpool players the next day.
Speaking to the Mirror, the Dane also said: “I always loved throw-ins as a kid, I watched my big cousins Bent and Jonny who were 8-12 years older than me, it was so cool they could throw those long throw-ins.
“It was like a superpower, they weren't professional players, but when I saw them throw-in the crowd were like whoa! And you don't get that for a corner kick!"