Brazilian international Neymar, 22, may be sold this summer due to a financial crisis at La Liga giants Barcelona.
The striker earns around £70k a week, but is demanding a bumper increase to £300k to take him on par with La Ligas top earners Lionel Messi and Cristano Ronaldo.
Barcelona are reluctant to commit to a wage increase, but are desperate to keep their star man. With the club already committed to huge deals for Messi and Suarez, they fear another mega deal for Neymar may cripple the club financially.
This uncertainty has put Manchester United on high alert. Representatives from United have made it clear to Neymar that they would be more than willing to match his wage demands, should the player choose to leave Barcelona.
Read all transfer ins and outs, completed deals visit football transfer news.