In this Nov 5, 2019 photo, Chelsea's English striker Tammy Abraham (left) vies with Ajax's Dutch defender Daley Blind (right) during the UEFA Champion's League Group H football match between Chelsea and Ajax at Stamford Bridge in London. (ADRIAN DENNIS / AFP)

Ajax Amsterdam defender Daley Blind says he is “feeling fine” after he collapsed during Tuesday’s pre-season friendly against Hertha Berlin when his implanted heart defibrillator momentarily switched off.

Daley Blind was diagnosed with heart muscle inflammation after experiencing dizziness in a Champions League game last year

The 30-year-old Netherlands defender dropped to the ground late in the game, which Ajax won 1-0 at the Johan Cruyff Arena, but was then able to walk off the pitch.

“Many thanks for all the kind messages I received. I can say that I’m okay and feeling fine,” Blind said on Twitter.

ALSO READ: Ajax's Blind suffers scare as defibrillator stops during game

The former Manchester United defender was diagnosed with heart muscle inflammation after experiencing dizziness in a Champions League game last year. He was fitted with an implantable cardioverter defibrillator (ICD) and returned to action in February.

Ajax said in a statement that Blind would undergo further tests before resuming training.