Sam Allardyce claimed Seamus Coleman's goal should have been disallowed for offside after Everton's 1-0 win at Selhurst Park left Crystal Palace in the Premier League relegation zone.
The Eagles' resilience was overcome when, with debutant Jeffrey Schlupp down suffering cramp, Coleman capitalised on the space left by his absence to collect Tom Davies' through-ball and shoot powerfully into the top-right corner.
The 87th-minute finish strengthened Everton's grip on seventh place and came after the impressive Wayne Hennessey had prevented the visitors building a commanding lead with several saves.
Replays suggest the full-back may have strayed narrowly offside when Davies played the ball, and Allardyce -- who has won only one of seven games since being appointed Palace boss -- feels his side were hard done by.