Borussia Dortmund are set to replace cancer-battling Ivory Coast forward, Sebastien Haller with Super Eagles forward, Sadiq Umar.

Haller joined Dortmund from Ajax this summer in a £29m move after scoring 32 goals for Ajax as they cruised to the Dutch league title.

He was set to boost Edin Terzic’s attack following the departure of Erling Haaland to Premier League champions Manchester City in May.

The former Ajax forward has been diagnosed with a testicular tumour, which turned out to be malignant, earlier in July and has already completed the first stage of his treatment.

In a statement, the Bundesliga club confirmed Haller will be out of action for “several months”.

“Sebastien will now receive the best possible treatment,” said BVB sporting director Sebastian Kehl.

“The chances of recovery are very good. We wish him and his family a lot of strength and optimism and our thoughts are with him during this difficult time.”

According to various reports from Spain, Dortmund are now looking on bringing in Super Eagles and Almeria forward, Sadiq Umar to replace Sebastian Haller.

Report has it that the 25-year-old Kaduna born has vacated his house in Almeria, adding fuel to the speculation.

Sadiq played a major role in Almeria securing promotion to the top division as champions of the Segunda Division after eight years of knocking.