Manchester United have jumped into the battle for Real Madrid midfielder Isco.

Despite public claims from both sides of the table, Isco's contract situation remains unresolved.

Diario Sport says the midfielder is demanding a major pay-rise to re-sign after playing a critical role on Real's Double triumph.

Isco isn't making any threat to leave, but has demanded Real match the offers he has from rival clubs.

Manchester City, Barcelona and now Manchester United have all tabled contracts worth more than double what Isco is currently earning.