Manchester United are ready to splash £50 million on Borussia Dortmund trio Shinji Kagawa, Robert Lewandowski and Mats Hummels, according to The Daily Mail.

Rivals Manchester City beat the Old Trafford outfit into second place on the last day of the season, and as such the Red Devils are eyeing a busy transfer window to get back to their former glories.

Jurgen Klopp's Dortmund side have won the Bundesliga for a second consecutive campaign this term, and dispatched Bayern Munich 5-2 in the DFB Pokal cup final on Saturday.

Sir Alex Ferguson's men are the frontrunners to sign Japanese winger Kagawa, who has turned down a contract extension and only has one year left at Signal Iduna Park.

The German side have confirmed that they expect the Asian flyer to leave this summer, but are determined to hold onto the rest of their stars.

"We expect Kagawa to go, but no amount of money will persuade us to sell the others," Dortmund managing director Hans-Joachim Watzke stated.

Hummels is a certainty for the Germany Euro 2012 squad and the centre back has quickly emerged as one of the best defenders in Europe.

Meanwhile, Poland international Lewandowski scored a hat-trick in the rout of Bayern, and his agent has confirmed that the striker has also turned down a new deal with Dortmund.

"The offer from Dortmund is not enough and I can confirm there is interest from Manchester United," Maik Barthel told reporters.

By Gareth McKnight

[ad_pod id='unruly-2' align='left']