Bournemouth boss Eddie Howe admits he's reluctant to host interested coaches.
The 41-year-old is wary of letting any secrets slip and so needs convincing to open his doors.
He explained to The Sun: “I go to clubs on foreign soil because there is no direct competition, you're not going to be stealing ideas that you're going to be using against them.
“The difficulty with opening my doors to someone in England is that could happen.
“If someone has a real thirst to learn specifically off me, so they've watched the team and want to know something about how Bournemouth do it, then that's OK.
“But just a generic 'I want to come' isn't enough.
“When I went to watch Maurizio Sarri, it was because I was enthralled by his style of play and what he'd delivered.
“Empoli was a small team with a lot of links to Bournemouth. I learnt so much from that trip.
“Hopefully he saw there was a direct link to what I was looking for.
“I had a really good relationship with him. I loved his playing philosophy and how he trained players. I really liked him so it was a big miss for me that he went back to Italy."