Martinez, who has been in charge of Everton since 2013, has come under pressure this season due to the team’s disappointing performances and results.
The Toffees could end up in the bottom half of the Premier League this campaign despite having a very good squad.
Collymore believes that the Merseyside outfit should keep faith in the former Wigan Athletic boss.
However, according to the former Liverpool striker, the Toffees should get rid of Martinez by Christmas if he fails to improve the defence.
“Bill Kenwright and Moshiri should act now with Lukaku,” Collymore wrote in The Mirror. “They should be on the front foot, sitting him down and outlining their plans. They should be telling him that they will splash out on top players and build a team round him, which will make the Champions League a viable and regular target.
“And they should be telling Martinez to go and get himself a defensive coach – or risk losing his job. I’m not advocating ditching Martinez because he’s got plenty of good qualities, but he needs to sort that defence out and, if it still isn’t working by Christmas, I’d bullet him.”
Martinez is a good manager, but he does need to work on Everton’s defence and perhaps he should heed Collymore’s advice about getting a defensive coach.
Everton should not make any rash decisions regarding the Spaniard’s future and should allow him time.
The Toffees may be enduring a disappointing Premier League campaign, but they could win the FA Cup this season.