Baines is believed to be the subject of interest from former Everton manager David Moyes following his move to Manchester United.

Martinez, though, insists the left-back is an important figure at the club and an integral part of his plans for the future. 

"I think Leighton is more than a player, he is an icon," the Spaniard told the club's official website.

"He represents a lot about our football club and I am really, really excited about Leighton."

Former Wigan man Baines joined Everton in 2007 and has made over 200 appearances for the club, a platform that has enabled him to earn England recognition, having been capped 17 times.  

"This is a big season for him and for us as a club," continued Martinez.

"When you are the left-back of this football club, and the level that he has been reaching over the last few years consistently, it shows me that he is the best left-back in the country. I can’t wait to start working with him."