Borussia Dortmund striker Jan Koller is in hospital after contracting pneumonia.

The Czech Republic international woke up feeling unwell and after being examined by doctors it was confirmed he had pneumonia.

“I had a headache and a fever this morning,” explained Koller.

“I went to hospital and they confirmed it as an inflammation.

“It’s good that the problem was intercepted early.

“The headache remains but the fever has receded.

“When I breathe in, something still feels wrong with my chest.”