Manchester United winger Nani insists that only God knows where his future lies as speculation increases that he could leave the club.

The 25-year-old has been unable to replicate the form of last season and has started just five of Manchester United's 12 games this season.

Nani has struggled to force his way into the United side this season [Reuters]

Speculation has increased over the last few months, with Italian champions Juventus consistently linked with a possible move for the winger.

Earlier this season it was reported by the Daily Mail that Zenit St. Petersburg had been close to sealing a deal for the attacking midfielder, only for the player's unrealistic wage demands to scupper the deal.

Juventus have remained interested and Nani has done little to ease suggestions that he could leave Old Trafford this season.

"Only God knows what awaits me," was the cryptic response from Nani when asked by The Sun whether he would be remaining at Manchester United.

The Portugal international has been forced to sit on the bench in the last two games against Stoke and Braga, prompting questions about his fitness.

However, the former Sporting Lisbon winger made it clear that he is in perfect health and ready to make an impact in the side.

"I am in perfect condition - I am physically good and feeling confident," said the winger. "I am the same Nani as always."

United do have options other than Nani in wide areas with Ashley Young and Antonio Valencia both impressing when handed the opportunity.

Sir Alex Ferguson has also experimented with three strikers and picked Wayne Rooney, Danny Welbeck and Robin van Persie all starting the 4-2 win over Stoke last weekend.

Should Manchester United decide to sell the midfielder then they would certainly demand a significant fee, having paid £14million some six years ago for a player who has become a regular match-winner since then.