Robin van Persie
Van Persie has not been in the best of forms this seasonReuters

Manchester United striker Robin van Persie admits he is not certain over his future at Old Trafford, saying that he is not sure whether the club will offer him a new deal when his contract expires in 2016.

The 31-year-old has been an important member of the Red Devils' squad ever since his £22.5 million switch from Arsenal in the summer of 2012.

However, as the Dutchman hasn't been in the best of forms this season, and United are well capable of investing in a new striker, van Persie admits that he is not sure whether he will be at Old Trafford after the expiration of his contract in 18 months' time.

"It is not up to me," Van Persie told the BBC. "For the moment, I am staying here for eighteen months. That is it really. I can't look into the future. I don't know what is going to happen after that, so we shall have to wait and see.

The former Arsenal striker, who says that he is not happy with his current form due to him scoring only eight goals from 17 appearances in the Premier League so far this season, insists that he is working very hard in training to improve himself.

"This year I have played something like 20 games and I have scored eight goals. I am not happy with that," he added.

"I want to score more. I will do everything, every day in training and during the games. I will keep doing what I have been doing for the last 10 years to make those goals."

Meanwhile, Van Persie, who admitted that he and his teammates were all feeling low after their goalless draw against League Two side Cambridge United in the fourth round of the FA Cup last week, says that their morales have drastically improved following the elimination of Manchester City and Chelsea from the competition.

"After the game against Cambridge, everyone was a little bit down," he added. "Although they played well so you have to give them credit because it is quite a stunt what they did.

"But in a way on Saturday, the whole mood changed. Manchester City were out. Chelsea were out and suddenly we are in it with a home replay against Cambridge.

"And of the so-called big clubs, with how it is now, it is just us, Arsenal, Liverpool and West Ham, but we are the highest left in the competition."

The Dutchman feels that United now have a very good chance of lifting their first FA Cup since 2004 this season.

"I think it has been 11 years since United won it last but I think we have a big chance this year," Van Persie added. "We want to win it. But again we have to look at the first game only because that is the next game against Cambridge."