Manchester United have reportedly increased their offer for Bayern Munich star Thomas Mueller to £70million.

German television network Sport 1 is reporting the offer has already been knocked back by the Bundesliga outfit, who are reportedly eager to keep the 25-year-old at the Allianz Arena.

United manager Louis van Gaal is determined to bolster his attacking stocks and sees Mueller as an ideal addition to his squad.

It is understood the Red Devils would give Mueller a five-year deal at Old Trafford, should he make the switch.