A deal for either club could prove costly, however, with other reports suggesting that Dortmund could demand a fee of between €70m-80m (£58-66m) for their prized asset. Kobel has made 143 appearances in all competitions since joining Dortmund from Stuttgart back in 2021, while twice being named in the Bundesliga Team of the Season.

Manchester United reportedly have "no chance" of signing Chelsea forward Christopher Nkunku permanently this month as this deal hinges on a "big if".

There are strong reasons why the deals look tempting on paper, with both players potentially better tactical fits under the other coach