Everton manager Roberto Martinez has claimed that there is a lot to come from striker Romelu Lukaku as he continues to take his game to the next level.

The 22-year-old has already scored 10 Premier League goals for the Merseysiders this season and is currently second in the race for the Golden Boot behind Leicester City's Jamie Vardy.

Ahead of Tuesday's Capital One Cup quarter-final clash with Middlesbrough, Martinez spoke of the ever-improving Lukaku who is beginning to mature as a footballer despite his youth.

"Romelu has been very consistent throughout this season and not just this season, but in the calendar year," said the Spaniard.

"To score 25 goals is an impressive figure and he is developing a strong relationship with the players around him.

"You see how influential he is in everything we do going forward and he has a clear understanding of being a focal point at times and being a clinical finisher at others.

"His diversity and what he brings to the team has been very reliable. That is something we need to carry on improving because he is only 22 and he is a very important part of what we are trying to do going forward.

"You have to look at what he has done since he arrived at the club. He arrived with incredible potential and he has shown a constant level of performance this season, which is down to maturity and understanding how you can affect the game and not just relying on taking the chances that come your way.

"I think he is becoming a more wise footballer about what is around him and he is a No 9 who is special in many aspects. You don't get that in too many footballers.

"Someone who can hold the play, with that power like he has, the way he can run with the ball with pace and technical quality and then the quality he has in his finishing.

"It is a combination of very special trademarks of a very good No 9."