Feyenoord defender Stefan De Vrij has not signed for Manchester United, according to the player's agent.

The 22-year-old has been linked with an £8m move to the Red Devils since Louis van Gaal was confirmed as David Moyes' successor at Old Trafford. United are keen on strengthening their central defending position after losing Nemanja Vidic and Rio Ferdinand.

De Vrij is currently on international duty with the Netherlands squad in the ongoing World Cup as Van Gaal has seen his side make it to the semifinals of the summer tournament. United and Lazio are believed to be interested in landing the Dutchman in the summer transfer window.

The centre-back's agent has played down both United and Lazio speculations and claims De Vrij is focused on the Netherlands' World Cup campaign.

"We have no agreement with Manchester United, nor have we signed for them," the Express quoted De Vrij's agent as saying.

"I don't know where this rumour came from. Stefan is concentrated only on the World Cup and he wants to continue doing well."

"Links to Lazio? No comment," the Dutch central defender's representative added.

Meanwhile, De Vrij has admitted that he could leave his current employers this summer and will take a decision on his future after completion of the World Cup in Brazil.

"My future? Yes, there is a chance I will be leaving, but now I am just thinking about the World Cup," De Vrij told RTV Rijnmond.

"I still do not know anything definite, so it is pointless saying too much about it."

With the defender's comments, United can still retain their hope in bringing De Vrij to Old Trafford. The Red Devils have already signed Ander Herrera and Luke Shaw this summer. However, they are yet to find replacements for Vidic and Ferdinand.

Meanwhile, the Mirror reports United are hopeful of completing a deal for Arsenal skipper Thomas Vermaelen. The Belgium international has one year left on his contract at the Emirates and Old Trafford is likely to be his next destination.