Lukaku struck in victory at West Ham United.
Martinez said: "Heâ€™s a thinker, a real knowledgeable man. He is someone who looks at games in a very different way and is like a manager in the way that he looks at movement.
"Sometimes you have to look at experience and at this stage itâ€™s perfect for both clubs. Chelsea know that Romelu will be looked after, allowed to grow. Iâ€™m sure Romelu will be very important for whatever team he plays for in the next 10 or 15 years."