Wayne Rooney's Birmingham were booed off after his first home game in charge ended in a 2-0 defeat to Hull in the Championship.
The Tigers, managed by Rooney's former assistant Liam Rosenior, ended a four-match winless run to hand Rooney a second successive loss since replacing John Eustace at St Andrew's.
Liam Delap picked off a poor backpass from Emmanuel Longelo to give the visitors a 12th-minute lead and Jaden Philogene's long-range strike settled the contest with 16 minutes left.
Rooney admits he will adapt his 'no-fear football' philosophy at Birmingham after a 2-0 defeat to Hull because his players cannot do it.
Liam Delap's 12th-minute goal and a superb solo effort from Jaden Philogene made it a miserable St Andrew's debut for Rooney, who has lost his first two games in charge, up against his former Derby assistant Liam Rosenior.
'You need to be brave in taking the ball, but it's clear from the first two games that the players aren't comfortable doing that,' said Birmingham manager Rooney.
'So there will be slight adjustments of course because we need to pick up points as well.
'I can get players up the pitch, boot the ball up the pitch and look to pick up second balls, but we need to get the balance right.
'This is on me - maybe I've asked them to do too much and I take that responsibility. We're asking them to play out from the back and be more front-footed.
'I said to the lads after the game 'if you don't feel you can do it, tell me, and we can adjust and adapt'.
'There's so many different elements to no-fear football. They've had snots and guts for the last 10 years and it's been very difficult.
'But it's not going to change within two weeks when the players haven't been used to a completely different way.
'As I'm
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