Ten Hag sends support to former Ajax striker after tumour diagnosis

confirmed on Monday that

has a testicular tumor and has left preseason training camp in Switzerland to undergo further tests.

Haller scored 32 goals last season for

under Ten Hag and the current United manager has sent him a message of support.

"It's horrible,"

he told MUTV.

"I have a fantastic relationship with him.

"He's my friend, he was my striker for several years with Utrecht and Ajax, and when you hear such news it's devastating.

"My thoughts are with him, with his family, and I hope he will recover quickly.”

Dortmund coach Edin Terzic also reacted to this news and wished his player well.

"Of course, we were shocked to hear the news yesterday,"

Terzic told Dortmund's media channels.

"I personally heard it about half an hour before we were preparing to leave for the game [a 3-1 friendly loss to Valencia].

"It was not easy for all of us to find the switch, we tried to do it as professionally as possible, but then we didn't talk about it with the team before the game, but informed the team after the game.

"Now I ask you to understand that it is brutally difficult for us. The diagnosis is still pending.

"Sebastien left us last night, went to Germany today for further examinations, and we are keeping our fingers crossed for Sebastien and his whole family that he will get well as soon as possible.

"First of all, it is about the human being Sebastien Haller getting well again.

"As for the sportive issues that come with this loss, we haven't thought about those yet because we are still awaiting the diagnosis. We don't even know yet how long he will be out."

Follow 

for the