Manchester United have promised manager Jose Mourinho they will sign three 'galaticos' in the transfer window as they attempt to keep the two-time Champions League winner from leaving Old Trafford.

The Portuguese boss has recently talked up the prospect of joining Paris Saint Germain, who he has described as "special" as he approaches the mid-way point in his three-year deal.

Mourinho has far from endeared himself to United fans either having criticised their negative reaction to his style of football and a number of substitutions.

The 20-time English league champions have the option to extend Mourinho's contract by another year should they wish – which would mean PSG or another rival club paying £24m to acquire him.

But United remain concerned Mourinho is far from happy and are preparing a package to tempt he ex-Chelsea and Real Madrid boss to remain.

Spanish publication Sport claim that United will offer Mourinho a new contract worth nearly £20m-a-year [€22m], a sizeable increase on the £15m he currently earns.

In addition, the Glazer family are also ready to offer Mourinho free reign in the transfer market and the chance to sign three 'galaticos' who would suit the club's style of play.

Atletico Madrid striker Antoine Griezmann and Real Madrid winger Gareth Bale are thought to represent two of those options with both players have endured difficult campaigns this season.

Whether the offer will be enough to keep Mourinho from flirting with rival clubs remains to be seen. He won two trophies in his first season in charge and returned United to the Champions League but has shown little desire publicly to remain at the club in the long-term.

"I signed a three-year contract and when I signed that three-year contract it was basically to try and improve the direction of the football team," he told The Mirror last week. "And obviously when we want to improve the direction of the football team, it means to try and win titles which we did already last season."

Jose Mourinho
Mourinho's demeanor has been far from positive in recent weeks. Getty Images