After 4.42 and 5.90 he threw in the towel.
It was only the second event after 100 meters where Nilsson ran in 11.46.
It was an old problem that resurfaced.
He started to feel it on Tuesday and thought it would be possible to keep it in check.
Nilsson was the last to join the Swedish squad after an invitation from the International Athletics Federation.
- He was in too much pain to be able to compete, says partner Nadja Cassadei from the stands to SVT Sport.