Nike and Warrior Sports are reportedly set to engage in a bidding war as the pair of American sportswear giants battle to claim the rights to be the official kit supplier to Premier League champions-elect Manchester United.

Manchester United currently have a deal with Nike worth £23.5 million-a-year, with the association between the two stretching back to 2002, and the agreement is not set to expire until the end of the 2014-15 season.

The Red Devils are, at present, involved in a period of exclusivity with Nike where talks will take place regarding a contract extension but, reports the Daily Mail, Manchester United will inform the company they want a significant rise on their current yearly package.

Warrior Sports, who have made their mark on the Premier League with Liverpool, are reportedly monitoring developments between Nike and Manchester United closely, and are ready to pounce should a new deal fair to be reached.

Liverpool's deal with Warrior Sports stands at £25 million-a-year, making it the largest deal its kind in British football, and they would have to break new ground once again if there is any hope of adding Manchester United to their roster.

Warrior Sports are reported to have informed Manchester United that they are prepared to make their interest official when Nike's period of exclusivity expires, and the Old Trafford club are holding out for a deal worth in excess of a yearly £30 million.

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