Warren Feeney admitted a Q&A session with Real Madrid boss Carlo Ancelotti helped inspired Wednesday night’s last-gasp derby win at the Oval.
Linfield came from two goals down to claim a remarkable 3-2 victory with virtually the last kick of the game.
Aaron Burns was the hero, forcing home Ivan Sproule’s corner in the fifth minute of injury time.
“I was over in Wales this week for my Pro Licence and I got to attend the Super Cup between Real Madrid and Sevilla,” Feeney said.
“I also got the chance to watch Real Madrid train and have a question and answer session with Ancelotti and it was fantastic.
“He said things like shapes, tactics etc don’t win you games.
“Tonight I said to the players to keep believing in themselves, and to come here and win 3-2 after being two goals behind is fantastic.”
Glentoran had Linfield on the ropes after 49 minutes following a clinical brace from David Scullion.
Scullion headed home in first half injury time and then doubled his and Glentoran’s tally four minutes after the restart with a thunderbolt shot from 25 yards.
Burns reduced the deficit in the 52nd minute with a simple header before Peter Thompson drew the sides level in the 73rd minute.
But Linfield - who had Jimmy Callacher sent off three minutes from time - snatched all three points when Burns forced home Sproule’s corner.
“I said to boys - believe how good you can be,” Feeney added. “Saturday’s 3-0 defeat to Portadown was tough for me. It is early days, but players have to take confidence from this. We dominated the game and set out a tempo and got goals at good time.”