The Chelsea winger has sealed a season-long loan move to Goodison Park but has yet to play in the Premier League and his new manager urges patience from supporters
The Ghana winger arrived on a season-long loan from Chelsea on Wednesday, having spent 2013-14 with Vitesse in the Eredivisie, and, while tipping his latest acquisition to make a big impact, the Spaniard believes that the step up in quality could lead to a period of transition.
"Christian arriving gives us an extra option and an extra boost ahead of the new season. He's the sort of player that you always want to see him involved with the ball," Martinez told reporters. "He's got that unpredictability in his play.
"I think the difference with his play opposed to another winger is that he can be penetrative and can use the one-on-one to good use. He is very good at finding space with his combination play, which is unusual as wingers usually have one or the other so I think that makes him quite rare as a winger.
"I do expect a bit of an adaptation period. He hasn't played in the Premier League so that always comes with an adaptation period.
"Physically he's in a good moment, it's more just helping him adapt to the needs of this league. I'm confident it's going to be a short period."
Atsu, who started his professional career with Porto and featured for Ghana at the World Cup in Brazil, sees his temporary switch to Goodison Park as an opportunity to prove his worth in the top flight.
"This is my first season in the Premier League. It's a high level for me and a good chance to prove myself," he enthused. "It was a really great experience for me to play in the World Cup and it will continue to help improve my confidence in the Premier League.
“I’m very happy and proud to be an Everton player. I think it’s a really good move for me because I can now play football - I had the possibility to go elsewhere but I chose Everton."
The loanee was also quick to acknowledge the role played by his new boss, which he says was a big factor in his deciding his future.
"[Martinez] played an important role for me coming here but I also made a decision to come because it's a good club and I think I will have more success here."
Romelu Lukaku made a permanent switch to Everton from Chelsea during the close-season, having spent last year on loan on Merseyside, and Atsu refused to rule out extending his stay on Merseyside.
"At the end of the season we will see what is what," he added.
Everton get their season under way against Leicester City on Saturday and Martinez says that anticipation is building for the new campaign, remarking: "You can feel a completely different excitement this week. You get ready for start of the season and that's what we had from Monday.
"Today, Christian arriving gives us an extra option and a boost in the squad. The group are a year older, a year wiser and more experienced in the way that we want to play."