Manchester United manager Erik ten Hag has sent well wishes in the direction of his former striker Sebastien Haller.

The two worked together at Ajax last season, before ten Hag signed for United and Haller secured a move to Borussia Dortmund.

The Ivory Coast international has been diagnosed with a testicular tumor after complaining of pain in the area.

"It's horrible," Ten Hag told MUTV after United's pre-season game against Crystal Palace in Australia.

"I have a fantastic relationship with him.

"He is my friend, my striker for several years with Utrecht and with Ajax.

"To hear such news is devastating. My thoughts are with him and with his family and I hope he will recover quickly."

Haller posted on Twitter about the news: "Thank you all for your many messages of support and affection since yesterday's announcement. My family and I thank you. I will now focus on my recovery to come back stronger."