Manchester United are cranking up their interest in Thomas Muller, with the English Premier League side making a massive bid for the Bayern Munich forward.

Louis Van Gaal is in the transfer market for a forward, and with deals for the likes of Edinson Cavani and Karim Benzema looking unlikely, Manchester United have switched their attentions to Muller.

The 25-year-old made his name while Van Gaal was the Bayern Munich manager, and the pair enjoys a really good relationship.

Muller has previously admitted to being flattered over interest from Manchester United, while insisting he is happy at Bayern Munich.

However, Manchester United are determined to push a deal through this summer with the club making a mega €100million (£69.5m) bid, according to Sport1.

The report states Manchester United already had a bid of €82m (£57m) turned down by Bayern Munich, which has led to this massive increase in the offer.

Bayern Munich are refusing to budge on their stance that Muller is not for sale, and the club, having already sold Bastian Schweinsteiger for £15m, will do everything in their power to ensure another one of their star players do not make a move to Old Trafford.

Bayern Munich chief executive Karl Heinz Rummenigge had assured the supporters no other player would be sold to Manchester United, and the German club will hope to stay true to those comments considering Muller is such a fan favourite at the club.

The English press have also latched onto the Muller to Manchester United story, and according to The Guardian, the Germany international is open to a switch to Old Trafford.

The report says Manchester United are offering the forward a staggering £265,000 a week, which is double of what he currently earns at Bayern.

However, Bayern, like Manchester United, are one of the biggest clubs in the world, and if they decide that a player is not leaving, and considering Muller is a Bayern man through and through, it will be difficult for the Premier League club to force through a move.

This looks like going for a while yet, however, and expect the transfer saga to carry right on through to the end of the summer transfer window.