The Toffees pulled Arsene Wenger's side apart to win 3-0 in the Premier League on Sunday, with a former Latics boss - Roberto Martinez - setting the Merseyside club up for victory.
Rosler has repeatedly praised Martinez for his impact on Wigan and the 45-year-old German reckons that his predecessor may have given him another tip ahead of the Championship club's last-four tie against the north Londoners at Wembley.
|7/2||Wigan are 7/2 with Bet365 to reach the FA Cup final|
"I like to soak up as much information as I can and he is one of the top managers.
"I've studied him very much [and] wasn't surprised he found a tactic to cause Arsene Wenger problems. I was very impressed with how good Everton were at the beginning of the game without the ball - to break the rhythm, to deny them space, to counterattack quickly.
"I was also impressed by how disciplined they were. They got their rewards. It was good for a young manager to see."
Wigan lifted the FA Cup last season and have already eliminated three Premier League clubs - Crystal Palace, Cardiff and Manchester City - on their way to this year's semi-finals, while Hull City or League One side Sheffield United will await the winners of Saturday's game.