A substantial loyalty bonus is believed to be the reason for the hold-up of Zlatan Ibrahimovic's proposed transfer to Manchester United.

According to the Daily Telegraph, the Swedish superstar and his agent Mino Raiola are waiting until June 30 before they complete the protracted deal that will see him move to Old Trafford on a lucrative deal.

The striker and his representative are due a substantial loyalty fee from French giants PSG if they manage to se out his contract which expires at the end of the month.

Ibrahimovic, 34, will officially become a free agent on July 1 and can then sign the one-year contract with the Red Devils worth around £250,000 per week that is being widely reported.

Ibrahimovic launched his new clothing line, A-Z, in Paris on Tuesday and further hinted that perhaps Manchester could be his next destination.

"There is no confirmation. No saying 'yes'. You will have to be patient with me," he said.

"I want you to keep wondering where I will go, keep making stories, and when I am tired I will let you know when my next destination is.

"My future is A-Z. There will also be A-Z in Manchester."