Denmark coach Kasper Hjulmand is being linked with Everton.
BT says Everton have been doing "concrete research" on Hjulmand.
Everton have "gone hunting" and want to know everything they can about Hjulmand.
Everton, according to the report, have inquired about Hjulmand "in the Danish football landscape" and want to know about various topics, including his management style, personality and media handling.
Current Blues boss Rafa Benitez has come under pressure over the past week, but owner Farhad Moshiri insisted on Thursday that the Spaniard needs more time and won't be sacked.
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