Topics: Bundesliga, Borussia Dortmund, Marco Reus, Mats Hummels, Ilkay Gundogan, English Premier League, Manchester United, Arsenal
After showing no signs of improvement, both English sides would prepare massive offers for players like Hummels, Gundogan and Marco Reus, who would leave Dortmund if the team's relegated.

With Borussia Dortmund's astonishingly bad season, several European clubs are waiting for the team's downfall to collect their top-quality players. Sources indicate that Premier League giants Arsenal and Man United are preparing interesting offers to sign players such as Marco Reus, Ilkay Gundogan and Mats Hummels during the upcoming summer transfer window.

First of all, Arsenal would be interested in signing Ilkay Gundogan to add depth to their midfield. Having struggled with a back injury for quite some time now, Arsene Wenger and his crew would only pen a deal with the German midfielder if he can prove he is fully fit. Gundogan's buyout clause is around the 16-million pound mark, with a probable discount if the team is indeed relegated at the end of the season.

The only player that has clearly stated a desire to leave Dortmund is Mats Hummels. After being sought out by Manchester United's execs following his brilliant performance in the World Cup, Hummels decided to stay with the German outfit, but after much study, the player recently revealed he will be considering his future when the season ends. If Manchester United wants to sign the World Champion, the Red Devils will have to invest at least 30 million pounds for his services.

Hummels talking to angry Dortmund fans after their latest loss against Augsburg

Finally, Marco Reus' future could be decided after this season's end. With a move to Bayern Munich out of the question due to an ongoing feud between the two teams, Reus' next destination could be the Premier League, given that his club of choice, Barcelona, remain banned from making any transfers until January 2016, destroying Reus' hopes of moving to Catalunya. Perhaps a move to Real Madrid could be possible, but with a midfielder surplus for Los Blancos, Carlo Ancelotti's team would have to get rid of James Rodriguez, Gareth Bale, Cristiano Ronaldo or Isco to make room for the German. Manchester City seems to be the appropriate destination for Reus, with Arsenal hoping to sign the player off from Dortmund, but like Real Madrid, the problem with such a signing would be the saturation of midfielders for Arsene Wenger's side. With a buyout clause of 20 million pounds, Reus would be an easy target for any top European club.