Borussia Dortmund have rejected reports that they will allow Mats Hummels to join Manchester United in the summer.

The Daily Mail on Tuesday claimed that Hummels was ready to quit the Westfalenstadion, and was in line to make a £36 million switch to Old Trafford at the end of the season.

The 26-year-old has been a United target for the last two transfer windows, but until now Dortmund have fended off the interest.

While he has not committed to BVB long-term, Hummels has also gone on record several times saying that he does not think about leaving the club he joined as a youngster from Bayern Munich in 2008.

But with the club almost certain to miss out on qualification for the Champions League next season, rumours have been sparked once again. Sources have told ESPN FC that BVB are bracing themselves for offers for Hummels, and could be willing to sell their defender.

Mats Hummels has made 206 Bundesliga appearances for Dortmund.

According to additional reports in the English press, United boss Louis van Gaal is willing to bid up to €41 million.

And with just two more years left on Hummels' contract, Bild reported that BVB could be willing to sell their star player for around €45 million.

However, speaking to the tabloid, Dortmund sporting director Michael Zorc laughed off the speculation.

"According to reports, Manchester United took the gloves off [opened talks] at least 13 times," he said. "Mats is an incredibly important player for us, with whom we continue to plan."

Meanwhile, BVB also rejected media reports that World Cup winner Matthias Ginter has been demoted to the club's second team, which is currently battling to avoid relegation in the third tier.

The 21-year-old featured in BVB II's 4-1 defeat to MSV Duisburg at the weekend, and last played for Jurgen Klopp's team in February in the 2-1 first leg defeat at Juventus in the Champions League. The centre-back, signed for €10 million from SC Freiburg ahead of the season, has been struggling for form all season.

"It's a normal process," BVB II coach David Wagner told kicker. "It's not a demotion. I am just sad for Matthias because of all the headlines. It's nonsense to talk about a demotion."