Roberto Martinez gives no guarantees over the future of Romelu Lukaku

The Belgian striker scored twice on Saturday to knock Chelsea out of the FA Cup

Roberto Martinez remains coy over the future of striker Romelu Lukaku, after the Belgian scored twice to knock Chelsea out of the FA Cup.

Lukaku has scored 18 times in the league so far this season and has become a key squad player after a quiet year at Merseyside last year.

"In any season the only thing that matters is what happens from now until the end of the campaign" Martinez told reporters after Saturday's game.

"I said many times Cristiano Ronaldo was sold by Manchester United so if Manchester United cannot keep Cristiano Ronaldo that is a sign of a modern game.

"If you sell a player for those sort of amounts I think you can get the benefit of adding three or four players in your squad.

"It is down to recruitment, bringing the right characters and I think we have done that for the last three years."

Iranian billionaire, Farhad Moshiri, is the new majority shareholder at Everton after purchasing 49.9 per cent of shares and insists he will give the club "whatever I have."

With the new financial backing, Martinez may be able to ward off interest in the player this summer.

"We have got big projects and I’m sure that Mr Moshiri mentioned that we are going to sit down in the summer and make a decision with what the next step is with Goodison, a new ground or developing Goodison,” he continued.

"We want to be a Champions League club, with a winning team and that is what every Evertonian wants to do.

"We have to go step by step and carry on performing like we did against Chelsea."

The Everton boss was particularly impressed with the striker's opening goal this weekend, stating:   

"It was probably one of best pieces of quality you will see in the FA Cup. That goal is as sweet as you’re ever going to see."